JPH0818323B2 - Opening / closing device for inner frame of tubular concrete product forming frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a device for opening and closing an inner frame with respect to an outer frame in a tubular concrete product molding formwork including an outer frame and an inner frame. Is.

[Problems to be Solved by Conventional Techniques and Inventions] Conventionally, an inner frame of this type 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 left and right side frame portions. And the upper end portion are connected to each other so that the left and right side frame portions face each other and can be tilted toward and away from each other. The inner frame can be opened and closed with respect to the outer frame by vertically moving the lower frame part and tilting the left and right side frame parts.

However, the vertical movement of the lower frame portion and the tilting of the left and right side frame portions are performed by separate instruments, so the opening and closing work thereof is very troublesome.

An object of the present invention is to improve the vertical movement of the lower frame portion and the tilting of the left and right side frame portions by a single opening / closing device to simplify the opening / closing operation of the inner frame.

Structure of the Invention [Means for Solving the Problems] As shown in the drawings of the embodiments described below, the present invention provides an outer frame 2
The inner frame 3 has an upper frame part 11, left and right side frame parts 12 and a lower frame part 13, and the left and right side frame parts with respect to the upper frame part 11.
In a cylindrical concrete product forming formwork capable of tilting in the left-right direction in which 12 are opposed to each other, and are spaced apart from each other, inside the inner frame 3, movable parts 20 and 21 fixed to a lower frame part 13 and left and right sides are fixed. Frame 1
Lifting means 28, 30 for supporting the movable parts 15, 16, 17, 18 fixed to 2 so as to be movable up and down and moving the movable parts 20, 21 on the lower frame part 13 side to lift the lower frame part 13. , 32,34,36 and left and right frame parts 12
Lift means 27, 29, 31, 3 for moving the movable parts 15, 16, 17, 18 on the side upward to tilt the left and right frame parts 12 toward each other.
It is equipped with 3,35 and.

[Operation] In the present invention, the lift means 28, 30, 32, 34, 36 move the movable portions 20, 21 on the lower frame portion 13 side to lift the lower frame portion 13, and the lift means 27, 29. , 31, 33, 35 move the movable parts 15, 16, 17, 18 on the left and right side frame parts 12 side upward and tilt the left and right side frame parts 12 toward each other, the inner frame 3 is moved to the outer frame. Open to 2. Further, the movable portions 15, 16, 17, 18 on the left and right frame portions 12 side and the movable portion 20 on the lower frame portion 13 side,
When 21 is moved downward, the left and right side frame portions 12 are tilted in a direction in which they are separated from each other, the lower frame portion 13 is moved downward, and the inner frame 3 is closed with respect to the outer frame 2.

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

As shown in FIGS. 1 to 3, the mold 1 includes an outer frame 2 and an inner frame 3, the outer frame 2 is fixed on a mounting table 4, and the inner frame 3 is an outer frame during molding. It is inserted in 2 and is fixed to the outer frame 2 by a clamp 5. A vibrator 6 is attached to the mounting table 4.

The outer frame 2 is composed of a lower frame part 7 and left and right side frame parts 8 rising upward from both left and right end parts of the lower frame part 7. A pair of upper and lower side corner parts of the left and right side frame parts 8 extend opposite to each other. Wife plate 9
Are fixed by a clamp 10 in a state of being in contact with each other. At the time of demolding, with the 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 of the upper end part face each other toward the lower frame part 7 and come close to each other. It can be tilted to the left and right.

As shown in FIG. 4, the inner frame 3 is composed of an upper frame part 11, left and right side frame parts 12, and a lower frame part 13. The left and right end parts of the upper frame part 11 and the upper end parts of the left and right side frame parts 12 are The left and right side frame parts 12 are connected to each other and can be tilted in the left and right directions in which they face each other so as to approach and separate from each other. It is possible to move up and down.

Next, the device F that opens and closes the inner frame 3 with respect to the outer frame 2 will be described in detail.

In the inner frame 3, the upper end of the elevating cylinder 15 in the upright state is movably supported in the supporting cylinder 14 fixed to the center of the upper frame 11 in the left-right direction. A lift rod (16) is fixed in a horizontal state, and a horizontal rod (17) is fixed in a horizontal state at the lower part of the lifting cylinder (15). One end of a link 18 is supported on both left and right ends of the horizontal rod 17 by a shaft 18a so as to be rotatable in the left-right direction, and the other end of the link 18 is fixed to the lower ends of the left and right side frame parts 12. The bracket 19 is rotatably supported by the shaft 18b, and both the shafts 1
Between 8a and 18b, the link 18 has an oblique shape that approaches the left and right side frame portions 12 as it goes downward. A lift rod 20 is fixed to the center of the lower frame 13 in the left-right direction.
An elevating rod 21 erected upright is fitted in the elevating barrel 15 so as to be vertically movable.

In addition, the lifting cylinder 15, the lift rod 16, the side rod 17, and the link 18
And a movable portion for tilting the left and right frame portions 12 in the left-right direction are formed, and the lift rod 20 and the lifting rod are provided.
A movable portion for vertically moving the lower frame portion 13 is constituted by 21 and.

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

As shown in FIG. 5, on the front side of the mounting table 4, a chassis 22 is inserted so as to be horizontally movable.
A lifter 23 is detachably fixed to the front end of 22 via a connecting portion 24. As shown in FIG. 9, this lifter 23
Both left and right masts 25 are erected on the base plate, and a pair of left and right hydraulic cylinders 27 and a hydraulic cylinder 28 located between them are installed side by side on a base plate 26 that is installed between the lower parts of the left and right masts 25. ing. Piston rods 27a, 2 of each hydraulic cylinder 27, 28
Sprocket 29, 30 is attached to 8a and piston rod 2
The sprocket 29, 30 moves up and down as the 7a, 28a move up and down. Elevating rods 31 and 32 are provided between the vertical center portions of the left and right masts 25 and between the lower portions of the left and right masts 25, respectively.
Is vertically erected, and a pair of left and right forks 33 are horizontally extended above the chassis 22 on the upper lifting rod 31, and a fork is provided at the center of the lower lifting rod 32 in the left-right direction.
34 are also extended. The left and right sprockets 29 and the central sprocket 30 are respectively wound around lifting chains 35 and 36, and as shown in FIG.
One end of is fixed to the base plate 26. Left and right lifting chains
The other end of 35 is fixed to the upper lifting rod 31, and the other end of the central lifting chain 36 is fixed to the lower lifting rod 32. When each piston rod 27a, 28a moves up and down, each sprocket 29, 30 also moves up and down, and each lifting rod 31, 32 moves each lifting chain.
It moves up and down together with each fork 33, 34 via 35, 36. Both upper forks 33 are movable parts in the inner frame opening / closing device F.
Of the 15-18, it is inserted below the lift rod 16
It is possible to lift. Further, the lower fork 34 is a movable part 20, 21 in the inner frame opening / closing device F.
Of these, the lift rod 20 is inserted below the lift rod 20 so that the lift rod 20 can be lifted.

The hydraulic cylinder 27, the sprocket 29 and the lifting rod
The movable part 15 ~
Lifting means for lifting the lift rods 16 of 18 are configured, and the lift rods 20 of the movable parts 20 and 21 are held by the hydraulic cylinder 28, the sprocket 30, the lifting rod 32, the forks 34, and the lifting chain 36. Lift means for raising is configured.

Now, as shown in FIG. 1 to FIG. 3, in the state before placing concrete, each fork 33, 34 is in the downward movement position, and the inner frame 3 inside the outer frame 2 is inserted into the inner frame 3. It is inserted below both lift rods 16 and 20 of the opening / closing device F. The lower frame portion 13 and the left and right side frame portions 12 of the inner frame 3 are closed to the outer frame 2 by their own weight to form a molding space S between the outer frame 2 and the inner frame 3, and the clamp 5 moves the inner frame 3 to the outside. It is fixed to the frame 2.

Then, concrete is poured into the molding space S between the inner and outer frames 3 and 2.

After placing, the lower fork 34 first moves upward to lift the lift rod 20.
When the lift bar 16 is lifted, the lower frame part 13 of the inner frame 3 is moved upward, and immediately after that, both upper forks 33 are moved up and the lift rod 16 is lifted, the left and right side frame parts 12 are mutually connected via the link 18. Tilt to approach. 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 was moved in a direction away from the outer frame 2, the inner frame 3 and the inner frame opening / closing mechanism F were placed on the forks 33, 34 as shown in FIG. In the state, the outer frame 2 is pulled out at the same time. Then, the left and right frame portions 8 of the outer frame 2 are opened, and the tubular concrete product is lifted and released from the outer frame 2.

Next, as shown in FIGS. 7 and 8, the lifter 23 is moved toward the outer frame 2 to move the forks 33, 34.
The inner frame 3 and the inner frame opening / closing mechanism F placed thereon are simultaneously inserted into the outer frame 2.

Then, first, both forks 33 on the upper side move downward to lift the rod.
When 16 moves downward due to its own weight, the left and right side frame portions 12 of the inner frame 3 tilt in a direction in which they are separated from each other via the link 18, and immediately after that, the lower fork 34 moves downward and the lift rod 20 moves downward due to its own weight. When moved, the lower frame portion 13 of the inner frame 3 moves downward. Therefore, the inner frame 3 closes with respect to the outer frame 2 as shown in FIG.

After that, concrete is poured in the same manner as described above.

Particularly, in this embodiment, when the inner frame 3 is placed and lifted by the forks 33, 34, the lower frame portion 13 and the left and right side frame portions 12 of the inner frame 3 can be opened with respect to the outer frame 2. Inner frame 3
The mold opening work can be performed very easily. Further, by moving the forks 33, 34 downward, the left and right side frame portions 12 and the lower frame portion 13 are closed to the outer frame 2 by their own weight, and the mold closing work of the inner frame 3 can be performed very easily.

Furthermore, since the inner frame 3 and the inner frame opening / closing device F can be simultaneously inserted into and removed from the outer frame 2 by using the forks 33, 34, the mold opening of the inner frame 3 and the outer frame described above can be performed. Two
It is possible to insert and remove the inner frame 3 etc. in series with
The molding work efficiency is improved.

[Second Embodiment] In the first embodiment described above, a fork 33 that lifts the lift rod 16 to open the left and right frame portions 12 and a fork 34 that lifts the lift rod 20 to open the lower frame portion 13 are provided. However, in the second embodiment, the left and right side frame portions 12 can also be opened by using only the forks 34 for opening the lower frame portion 13.

That is, as shown in FIG. 11, a long hole 37 is formed in the support cylinder 14 fixed to the upper frame portion 11, and a lift rod is formed in the long hole 37.
16 are supported so that they can move up and down. A horizontal rod 17 is connected to the lift rod 16. The upper end of the lifting rod 21 is a support tube 14
The lift rod 16 can be lifted by the upward movement of the lifting rod 21.

Now, when the fork 34 lifts the lift rod 20, first, the lower frame portion 13 moves upward and opens to the outer frame 2, and immediately after that, the lift rod 20.
When 16 is lifted by the lifting rod 21, the left and right frame portions 12 are tilted by the links 18 and open with respect to the outer frame 2. On the other hand, when the fork 34 moves downward, both lift rods 16 and 20 move downward, first the left and right side frame portions 12 close to the outer frame 2, and immediately thereafter the lower frame portion 13
Closes to the outer frame 2.

EFFECTS OF THE INVENTION According to the present invention, since 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 can be performed by the single opening / closing device F, the opening / closing of the inner frame 3 is performed. Work becomes easy.

[Brief description of drawings]

FIG. 1 is a side view showing a state before placing concrete in a tubular concrete product molding form according to the first embodiment,
2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is B of FIG.
A cross-sectional view taken along the line B, FIG. 4 shows the state in which the inner frame is opened with respect to the outer frame in the same formwork after concrete placement, and FIG. 5 shows the inside of the same formwork after concrete placement. FIG. 6 is a side view showing a state where the frame is pulled out from the outer frame, and FIG.
FIG. 7 is a side view showing a state in which the inner frame is inserted into the outer frame in the same form of the tubular concrete product taken out from the outer frame, and FIG. 8 is a D- line of FIG. D line sectional view,
FIG. 9 is a front view showing the lifter, and FIG. 10 is an E- of FIG.
A sectional view taken along the line E and FIG. 11 are views corresponding to FIG. 3 showing a second embodiment of the inner frame opening / closing device. 1 ... form frame, 2 ... outer frame, 3 ... inner frame, 11 ... upper frame part,
12 …… side frame part, 13 …… lower frame part, 15 …… elevating cylinder, 16 …… lift rod, 17 …… side rod, 18 …… link, 20 …… lift rod,
21 …… elevating rod, 23 …… lifter, 27,28 …… hydraulic cylinder, 29,30 …… sprocket, 31,32 …… elevating rod, 33,34
...... Fork, 35, 36 ・ ・ ・ Lifting chain, F …… Inner frame opening / closing device, G …… Inner frame inserting / removing device.

Claims (1)

[Claims] 1. An outer frame (2) and an inner frame (3), wherein the inner frame (3) has an upper frame part (11), left and right side frame parts (12) and a lower frame part (13). It has both the left and right frame parts (1
In a tubular concrete product forming mold which is capable of tilting in the left and right directions facing each other toward and away from each other, a movable part (20, 20) fixed to the lower frame part (13) in the inner frame (3). 21) and the movable part (1
5,16,17,18) are supported so as to be movable up and down, and the movable means (20,21) on the lower frame (13) side is moved upward to lift the lower frame (13) (28). , 30, 32, 34, 36) and the movable parts (15, 16, 17, 18) on the left and right side frame parts (12) side are moved upward and the left and right side frame parts (12) are tilted toward each other. An opening / closing device for an inner frame of a tubular concrete product molding form, which is provided with lifting means (27,29,31,33,35).