JPH0211306A - Apparatus for opening of inner forms in forms for molding of cylindrical concrete product - Google Patents

Abstract

PURPOSE:To simplify the separation of an inner forms by performing a movement upward and downward of the lower forms part with respect to the inner forms and an inclining movement of left and right side forms of the inner forms by means of one opening apparatus. CONSTITUTION:In a state before a concrete is cast, each fork 33 and 34 is at a lower moving position and is inserted below the lift levers 16 and 20 of an inner forms opening apparatus F in an inner forms 3 inserted in an outer forms 2. A lower forms part 13 and left and right side forms part 12 of the inner forms 3 are closed with respect to the outer forms 2 by gravity and a molding space S is formed between the outer and inner forms 2 and 3. After a concrete is cast in the molding space S, when the lower fork 34 is moved upward and a lift lever 20 is elevated, the lower forms part 31 of the inner forms 3 is moved upward. Just after that, when both upper forks 33 are moved upward and a lift lever 16 is elevated, the left and right side forms parts 12 are moved aslant in the approaching direction each other and the inner forms 3 is opened with respect to the outer forms 2.

Description

Detailed Description of the Invention Object of the Invention [Field of Industrial Application] The present invention relates to a device for opening and closing the inner frame relative to the outer frame in a formwork for forming a cylindrical concrete product consisting of an outer frame and an inner frame. It is something.

Problems to be solved by conventional techniques and inventions 1 Conventionally,
This type of inner frame has an upper frame portion, left and right side frame portions, and a lower frame portion, and the left and right end portions of the upper frame portion and the upper ends of the left and right side frame portions are connected to each other, so that the left and right side frame portions are relative to each other. It can be tilted in the direction of approaching and separating. By moving the lower frame up and down and tilting the left and right side frames,
The inner frame can be opened and closed relative to the outer frame.

However, since the vertical movement of the lower frame portion and the tilting of the left and right side frame portions are performed using separate instruments, opening and closing operations are very troublesome.

An object of the present invention is to simplify the opening/closing work of the inner frame by improving the vertical movement of the lower frame part and the tilting of both left and right frame parts by a single opening/closing device.

Structure of the Invention [Means for Solving the UR Problem 1] As shown in the drawings of embodiments described later, the present invention consists of an outer frame 2 and an inner frame 3, and the inner frame 2 has an upper frame portion 11 and a A formwork for forming a cylindrical concrete product, which has a frame part 12 and a lower frame part 13, and is tiltable in the left-right direction so that the left and right side frame parts 12 face each other with respect to the upper frame part 11 and move toward and away from each other. Within the inner frame 3, a movable part 20.21 fixed to the lower frame part 13, and movable parts 15, 16, 17 fixed to the left and right side frame parts 12.
Lifting means 28, 30, 32, 34, and 36 that support the frame 18 so as to be vertically movable and lift the lower frame 13 by moving the movable part 20, 21 on the lower frame 13 side upward; Part 12
It is provided with lift means 27, 29, 31, 33, 35 for moving the side movable parts 15, 16, 17, 18 upward and tilting the left and right side frame parts 12 in a direction toward each other.

[Function] In the present invention, the lift means 28.30.32.34
．． 36, the movable portion 20° 21 on the lower frame portion 13 side moves upward to lift the lower frame portion 13, and the lifting means 27
．． 29.31.33.35, when the movable parts 15.16.17.18 on the left and right frame portions 12 are moved upward and the left and right frame portions 12 are tilted in the direction toward each other, the inner frame 3 is moved out. Open to frame 2. Moreover, the movable part 15 on the left and right side frame parts 12 side
．． 16.17.18 and the movable part 201 on the lower frame part 13 side
21 moves downward, the left and right frame sections 12 tilt in the direction of separating from each other, and the lower frame section 13 moves downward, causing the inner frame 3
closes against the outer frame 2.

[First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

As shown in Figures 1 to 3, the formwork 1 consists of an outer frame 2 and an inner frame 3.
The outer frame 2 is fixed on an RA stand 4, and the molding frame 3 is inserted into the outer frame 2 and fixed to the outer frame 2 with a clamp 5. lit! Stand 4
A vibrator 6 is attached to the.

The outer frame 2 consists of a lower frame part 7 and left and right frame parts 8 rising upward from both left and right ends of the lower frame part 7. The end plates 9 are fixed by clamps 10 in a state where they are in contact with each other. At the time of demolding, with this clamp 10 and the clamp 5 between the inner and outer frames 3 and 2 removed, the left and right side frame parts 8 and the end plate 9 at the upper end thereof face the lower frame part 7 and move toward and away from each other. It is designed so that it can be tilted from side to side.

As shown in FIG. 4, the inner frame 3 consists of an upper frame part 11, left and right frame parts 12, and a lower frame part 13, and the left and right ends of the upper frame part 11 and the upper ends of the left and right frame parts 12 The left and right frame parts 12 are connected to each other so that they can be tilted in the left and right directions toward and away from each other, and the lower frame part 13 is separated from the left and right frame parts 12 at the lower ends of the left and right frame parts 12. It can be moved up and down.

Next, the device F for opening and closing the inner frame 3 with respect to the outer frame 2 will be described in detail.

A support fixed to the center of the upper frame portion 11 in the left-right direction within the inner frame 3 [14] supports the -F end of the vertically vertical vertically movable vertically moving cylinder 15; A lift rod 16 is fixed horizontally to the upper part, and a lifting rod 16 is fixed to the upper part.
A horizontal rod 17 is fixed to the lower part of U15 in a horizontal state. One end of a link 18 is rotatably supported in the left and right directions by a shaft 18a at both left and right ends of the horizontal rod 17, and the other end of this link 18 is the lower end of the left and right frame portions 12. Both shafts 18a are rotatably supported by a shaft 18b with respect to a bracket 19 fixed to the section.

Between 18b, this link 18 forms an oblique shape that approaches the left and right side frame portions 12 as it goes downward. Moreover, the lower frame part 13
A lift rod 20 is fixed to the center in the left and right direction of
It is inserted and fitted so that it can move up and down.

The elevating tube 15, the lift rod 16, the horizontal rod 17, and the link 18 constitute a movable portion that tilts the left and right frame portions 12 in the left-right direction, and the lift rod 2
0 and the lifting rod 21 constitute a movable part that moves the lower frame part 13 up and down.

Next, the device G for inserting and removing the inner frame 3 into and from the outer frame 2 will be described in detail.

As shown in FIG. 5, a chassis 22 is fitted on the front side of the mounting base 4 so as to be movable in the horizontal direction, and a beam cover 23 is attached to and detached from the front end of the chassis 22 via a connecting portion 24. Possibly fixed.

As shown in FIG. 9, both left and right masts 25 are erected on the lifter 23, and a pair of left and right hydraulic cylinders 27 are mounted on a base plate 26 installed between the lower parts of the left and right masts 25. A hydraulic cylinder 28 located at is arranged in parallel. Piston rod 27a of each hydraulic cylinder 27.28
, 28a are attached with sprockets 29, 30, and the sprockets 29, 30 are attached to the piston rods 27a, 28a as they move up and down.
9°30 is designed to move up and down. Lifting rods 31 and 32 are vertically movably installed between the vertical center portions of both the left and right masts 25 and between the lower portions of both the left and right masts 25, and a pair of left and right forks 33 are installed on the upper lifting rod 31 to support the vehicle chassis 22. A fork 34 extends horizontally upward, and a fork 34 similarly extends from the center of the lower lifting rod 32 in the left-right direction. Lifting chains 35.36 are wound around both the left and right sprockets 29 and the center sprocket 30, respectively, and as shown in FIG.
36 is fixed to the base plate 26 at one end.

The other ends of both left and right lifting chains 35 are fixed to the upper lifting rod 31, and the other ends of the central lifting chain 36 are fixed to the lower lifting rod 32.
When 7a and 28a go up and down, each sprocket 29.30
The lifting rods 31 and 32 are connected to each lifting chain 35.
36 and move up and down with each fork 33,34. - The upper two oaks 33 are inserted below the lift rod 16 of the movable parts 15 to 18 in the inner frame opening/closing device so as to be able to lift the lift rod 16. The fork 34 is inserted below the lift rod 20 in the movable part 20.21 of the inner frame opening/closing device @F so that the lift rod 20 can be lifted.

The hydraulic cylinder 27, the sprocket 29, the lifting rod 31, the fork 33, and the lifting chain 35 constitute a lifting means for lifting the lifting rod 16 of the movable parts 15 to 18, and the hydraulic cylinder 28 and the sprocket 30, the lifting rod 32, the fork 34, and the lifting chain 36, the lifting rod 20 of the movable part 20.21
Lifting means is configured to lift the.

Now, as shown in FIGS. 1 to 3, in the state before concrete pouring, each fork 33 and 34 are in the lower movement position, and the inner frame 3 is inserted into the outer frame 2. It is inserted below both the shaft rods 16.degree. 20 of the spacer 1r1 device F. The lower frame portion 13 and the left and right side frame portions 12 of the inner frame 3 close against the outer frame 2 due to their own weight, forming a molding space S between the outer frame 2 and the inner frame 3, and the inner frame 3 is moved outward by the clamp 5. It is fixed to frame 2.

Then, concrete is placed in the forming space S between both the inner and outer frames 3 and 2.

When pouring, first the lower fork 34 moves up and the lift rod 2
0 is lifted, the lower frame portion 13 of the inner frame 3 moves upward, and immediately after that, both upper forks 33 move upward and the lift rod 16 is lifted, the left and right frame portions 12 are moved through the links 18. Tilt toward each other. Therefore, the inner frame 3 opens with respect to the outer frame 2, as shown in FIG.

Next, as shown in FIG. 5, when the lifter 23 is moved away from the outer frame 2, the inner frame 3 and the inner frame opening/closing mechanism F are placed on each fork 33 and 34, as shown in FIG. In this state, they are handled simultaneously from outer frame 2. Then, the left and right frame portions 8 of the outer frame 2 are opened, and the cylindrical concrete product is lifted and released from the outer frame 2.

Next, as shown in FIGS. 7 and 8, when the lifter 23 is moved in the direction approaching the outer frame 2, each fork 33.
The inner frame 3 and the inner frame opening/closing mechanism F placed on the outer frame 2
are inserted simultaneously within.

Then, when the upper forks 33 move downward and the lift rod 16 moves downward due to its own weight, the left and right frame portions 1 of the inner frame 3 move downward.
2 are tilted in the direction of separating from each other via the link 18,
Immediately after that, when the lower fork 34 moves downward and the lift rod 20 moves downward due to its own weight, the lower frame portion 13 of the inner frame 3 moves downward. Therefore, the inner frame 3 closes to the outer frame 2 as shown in FIG.

Thereafter, concrete is placed in the same manner as described above.

Particularly in this embodiment, when the inner frame 3 is lifted up by each fork 33, 34, the lower frame part 13 and the left and right side frame parts 12 of the inner frame 3 can be opened with respect to the outer frame 2. The mold opening work of the inner frame 3 can be performed very easily.

In addition, by moving each frame A-33° 34 downward, the left and right side frame portions 12 and the lower frame portion 13 close against the outer frame 2 due to their own weight.
The mold closing work of the inner frame 3 can also be performed very easily.

Roughly speaking, since the inner frame 3 and the inner frame opening/closing device F can be inserted into and removed from the outer frame 2 at the same time using these flaps 33 and 34, it is possible to simultaneously insert and remove the inner frame 3 and the inner frame opening/closing device F. This allows the insertion and removal of the inner frame 3 and the like to and from the outer frame 2 to be performed in succession, improving molding work efficiency.

[Second Embodiment] In the first embodiment described above, the fork 33 that lifts the lift rod 16 to open the left and right side frame portions 12 and the lower frame portion 13
A fork 34 is provided for lifting the lift rod 20 in order to open it, but in this second embodiment, only the fork 34 for opening the lower frame part 13 is used to open the left and right frame parts 1.
2 can also be opened.

That is, as shown in FIG. 11, an elongated hole 37 is formed in the support cylinder 14 fixed to the upper frame portion 11, and the lift rod 16 is supported in this elongated hole 37 so as to be movable up and down. A horizontal rod 17 is connected to this lift rod 16. The upper end of the lifting rod 21 is inserted into the support cylinder 14, and the lifting rod 16 can be lifted by upward movement of the lifting rod 21.

Now, when the fork 34 lifts the lift rod 20, the lower frame portion 13 moves upward and touches the outer frame 2, and when the direct foot rod 16 is lifted by the lifting rod 21, the left and right side frame portions 12 is tilted by the link 18 and opened with respect to the outer frame 2. On the other hand, when the fork 34 moves downward, both the foot rods 16.
20 moves downward, first, the left and right side frame portions 12 close to the outer frame 2, and the directly lower frame portion 13 closes to the outer frame 2.

Effects of the Invention According to the present invention, the vertical movement of the lower frame portion 13 of the inner frame 3 and the tilting of the left and right side frame portions 12 of the inner frame 3 are controlled by one opening/closing device Fl,
:J, ri can be carried out, so the work of opening and closing the inner frame 3 becomes easy.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the state before concrete is poured in the formwork for forming a cylindrical concrete product according to the first embodiment;
Figure 2 is a cross-sectional view taken along line A-A in Figure 1, and Figure 3 is B in Figure 1.
-B line sectional view, Figure 4 is a diagram equivalent to Figure 3, which shows the inner frame in relation to the outer frame in the same formwork after concrete pouring, and Figure 5 is the inner frame in the same formwork after concrete pouring. A side view showing the state in which the frame is pulled out from the outer frame.
A sectional view taken along the line C--C in the figure, FIG. 7 is a side view showing a state in which the inner frame is inserted into the outer frame of the same form frame in which the cylindrical concrete product has been taken out from the outer frame, and FIG. 1] Line sectional view, Figure 9 is a front view showing the beam lid, Figure 10 is a sectional view taken along line E-E in Figure 9, and Figure 11 is the third embodiment showing the second embodiment of the inner frame opening/closing device. It is a figure equivalent figure. 1...Formwork, 2...Outer frame, 3...Inner frame, 11...
- Upper frame part, 12... Side frame part, 13... Lower frame part, 15
...t7 descent, 16...lift rod, 17...horizontal rod, 18...link, 20...lift rod, 21...
Lifting rod, 23... Lifter 27.28... Hydraulic cylinder, 29.30... Spr[]kekerat 31.32
... Lifting rod, 33.34 ... Fork, 35.36
... Lifting chain, F... Inner frame opening/closing device, G...
Inner frame insertion/removal device. Patent applicant: Showa Concrete Industry Co., Ltd.
1) Hironobu Figure 8 Figure 2 Figure 4 Figure 101! f

Claims (1)

[Claims] 1. Consists of an outer frame (2) and an inner frame (3), and the inner frame (2) has an upper frame portion (11), left and right side frame portions (12), and a lower frame portion (1).
3), and has left and right side frame parts (1) with respect to the upper frame part (11).
2) in a formwork for forming cylindrical concrete products that can be tilted in the left and right directions to approach and separate the movable parts (20, 2) fixed to the lower frame (13) within the inner frame (3). 21) and movable parts (15, 16, 17, 18) fixed to the left and right frame parts (12) so as to be movable up and down, and the movable parts (20, 21) on the lower frame part (13) side Lift means (28, 30, 3) that moves upward to lift the lower frame part (13).
2, 34, 36) and the movable parts (15, 16, 17, 18) on both the left and right frame portions (12) upward, thereby tilting the left and right frame portions (12) in a direction toward each other. (27, 29, 31, 33, 35) An opening/closing device for an inner frame in a form for forming a cylindrical concrete product, characterized by comprising: