JPH01294197A - Vertical direction inversion method for lengthy concrete u-groove and lengthy concrete u-groove dedicated clamp for the method - Google Patents

Abstract

PURPOSE:To easily reverse a U-groove without damaging it by clamping side wall portions on both ends of the U-groove and reversing it around an axis centering the center of gravity when conveying the length concrete U-groove used ford civil engineering works. CONSTITUTION:A pair of holders 7 supporting both ends of a lengthy concrete U-groove 2 with a hanging means are relatively rotatably fitted to a clamp main body 8, a pair of clamping means 12 clamping both ends of the U-groove 2 are provided on the clamp main body 8. Each clamping means 12 is constituted of a pair of clampers 12A clamping the side wall portion 2A and a driving mechanism of the clampers 12A. Both the right and left side walls 2A of the U-groove 2 in the upward state are clamped by a lengthy concrete U-groove dedicated clamp 1 with such constitution, this U-groove 2 is revolved centering the center of gravity, and the vertical direction is reversed. The driving mechanism for the clamping operation can simply perform the clamping by the handle operation combined with a handle 12a and a a bevel gear.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to long concrete U-shaped grooves (for example, 1 to 2 Upside down reversal of long concrete U-shaped grooves used when transporting (tons of concrete) from the factory to the construction site using large transport vehicles, and when unloading from the transport vehicle to the installation site at the construction site. The present invention relates to a method and a clamp exclusively for U-shaped grooves used in the method.

[Constitution of conventional technology and its problems]

First of all, when manufacturing a long concrete U-shaped groove, when the formwork is removed at the completion of the forming process, the U-shaped groove will normally face downwards, and when laying it at the construction site, the U-shaped groove should be turned upward. Therefore, it is necessary to turn it over before unloading it from the transport vehicle and lowering it to the installation site.

However, in the past, the following clamps were generally used as clamps exclusively for long concrete U-shaped grooves.

For example, as shown in FIG. 5, clamps (100) that clamp the upward side wall portions (102A) of the left and right ends of the U-shaped groove (102) from above are suspended from wire ropes (103), and a balance is attached to the clamps (100). (104) to the upper wire (105), which is then raised and lowered by a crane.

Alternatively, as shown in FIG. 6, the upward side wall portion (102A) of the U-shaped groove (102) may be an expander-type clamp (
100) is used.

In addition, in order to reverse the U-shaped groove (102), a method shown in FIG. 7 has also been conventionally used.

That is, in order to invert the concrete U-shaped groove (102), first, the U-shaped groove side wall portion (10
2A) in the width direction, and insert a pin (10
1) and wire lobe (
106), then lift it up and place it in a concrete U-shaped groove (
102) in a suspended state, then attach this pin (
101) The method used was to turn the bottle around, let it land on the installation site, and then fill the bottle hole with concrete.

When this reversal method is adopted, the concrete U-shaped groove (
102) in the vertical direction (
space is required to flip it in the height direction),
In addition to the inconvenience and danger of having to lift the crane very high each time, there is also the disadvantage that there are restrictions on where to turn over very long objects.

Moreover, in addition to the trouble of repeatedly drilling pin holes for reversal in the U-shaped groove (102) once the molding is completed and the trouble of embedding these holes, there is a negative impact on the strength of the U-shaped groove (102) when drilling pin holes. was there.

[Purpose of the invention]

The present invention has been made in view of the problems of the prior art, and eliminates the need to drill holes in the U-shaped groove for reversing, and also saves a large space (in the height direction) for reversing. Concrete (concrete) of long lengths without the need for
To provide a method for vertically reversing a long concrete U-shaped groove by which the vertical direction of the groove can be easily reversed, and a clamp exclusively used for the long concrete U-shaped groove used in the method.

[Means for solving problems]

The present invention has been made in view of the problems of the prior art, and in the method of vertically reversing a long concrete U-shaped groove (2) according to claim (1), (a) the U-shaped groove (2) At both ends of the U-shaped groove (2), the U-shaped groove (2) is formed around the longitudinal axis centering on the center of gravity in a cross-sectional view of the U-shaped groove (2). They adopted a technical solution by rotating the holder and reversing its vertical orientation.

In claim (2), (b) the long concrete is deviated from the center of gravity of the U-shaped groove (2) in a cross-sectional view in order to facilitate reversal of the U-shaped groove (2); A technical solution was adopted in which the rotation was made around the longitudinal axis with the point at which the rotation was made as the center of rotation.

In addition, the clamp (1) for long concrete U-shaped grooves according to the present invention solves the problems of the above-mentioned prior art by (c) suspending the long concrete U-shaped grooves (1);
2) is a clamp (1) exclusively for long concrete U-shaped grooves that suspends the U-shaped groove (2) and reverses the vertical direction of the U-shaped groove (2), wherein both ends of the U-shaped groove (2) are supported by the hanging means. A pair of holding bodies (7) are attached to the clamp body (8), respectively.
The clamp body is mounted so as to be relatively rotatable around a longitudinal axis with the center of gravity of the U-shaped groove (2) in a cross-sectional view or a point offset from this center of gravity as the rotation center. (8) is provided with a pair of clamping means (12) for clamping both ends of the U-shaped groove (2), and each clamping means (12) is provided with a pair of clamping means (12) for clamping at least the opposing side wall portions (2A) from both sides. A unique solution was adopted, consisting of a body (12A) and a drive mechanism (12B) for clamping and releasing the clamping bodies (12A).

Further, in claim (4), (d) the pair of clamping means (1) is arranged so that the U-shaped groove (2) can be easily reversed by eccentrically moving the U-shaped groove (2) from its center of gravity.
A solution was adopted in which at least one of 2) is provided with an inversion axis center adjustment mechanism (13) using a long hole (4) so that the position can be changed and adjusted in the width direction of the U-shaped groove (2). It is.

Further, in claim (5), (e) In order to prevent the U-shaped groove (2) from being inadvertently reversed when lifted, the U-shaped groove is formed in at least one of the pair of holders (7). The solution was to provide a lock handle (15) to restrict and release the reversal of (2).

Furthermore, in claim (6), (f) in order to enable both side walls of the U-shaped groove (2) to be easily and smoothly held by one handle operation, the holding operation is Drive mechanism for (12B
) is engaged with the handle (12a), the drive shaft (12b) fixed to the handle (12a), the bevel gear (12c) fixed to the tip of the drive shaft (12b), and rotates only by meshing with the bevel gear (12C). Left and right bevel gears (12d) and (12e) freely provided, screw shafts (12f) and (12g) fixed to these left and right bevel gears (12d) and (12e), respectively, and these screw shafts (12f) and (12g). movable shafts (12h) and (12i) coaxially screwed together, respectively, and prevent rotation of these movable shafts (12h) and (12i);
Clamping frame (12j) that holds so as to only allow sliding movement.
(12k), and each of the movable axes (12h) (
121) clamping cam body (12m) installed at the tip of the
They adopted the following solution: (12n).

Furthermore, in claim (7), (7) In order to enable the both side walls of the U-shaped groove to be easily and smoothly clamped with one handle operation,
A drive mechanism (12B) for the clamping operation includes a handle (12a), a drive shaft (12b) fixed to the handle (12a), a bevel gear (12c) fixed to the tip of the drive shaft (12b), This bevel gear (
Left and right bevel gears (12d) and (12e) are provided to mesh with the left and right bevel gears (12c) and rotate freely, and screw shafts (12f) and (12g) are slidably fitted to these left and right bevel gears (12d) and (12e), respectively. ), and the screw shafts (12f) and (12g) are screwed into the clamping frames (12j) and (12k), respectively.

[For production]

Long concrete U transported from the factory to the facility site
When installing the U-shaped groove (2) at a predetermined location, the U-shaped groove (2)
A pair of holders (7) whose both ends are supported by hanging means are respectively attached to the clamp body (8) so as to be rotatable relative to the clamp body (8), and the U-shaped groove (
A pair of clamping means (12) are provided for clamping both ends of 2),
Each clamping means (12) has at least an opposing side wall portion (
a pair of clamping bodies (12A) that clamp 2A) from both sides;
The left and right sides of the U-shaped groove (2), which is in an upward position, are clamped by the long concrete U-shaped groove dedicated clamp (1), which is composed of a drive mechanism (12B) that clamps and releases the clamping bodies (12A). Holding the wall (2A), this U-shaped groove (2) is formed around the longitudinal axis centered on the center of gravity (or centered on the eccentric position) in a cross-sectional view of this U-shaped groove (2).
2) is rotated to reverse the vertical direction.

Then, the above long concrete) U-shaped groove (2) is reversed,
If the U-shaped groove (2) is rotated around the longitudinal axis with a point offset from the center of gravity in the cross-sectional view of the U-shaped groove (2) as the center of rotation, the U-shaped groove (2) itself It can be tilted and reversed by its own weight, making the reversal work easier.

Further, by providing a lock handle (15) on at least one of the pair of holders (7) to restrict and release the restriction from reversing the U-shaped groove (2), the U-shaped groove (2)
The lock handle (
15) can be reliably controlled.

Furthermore, the drive mechanism (12B) for the above-mentioned clamping operation includes one handle (12a), a bevel gear (12c), (12
d), (12e), by using in combination the screw shafts (12f) and (12g) and the movable shafts (12h) and (121) that are screwed into the screw shafts (12f) and (12g). , both side walls of the above U-shaped groove (2) (
2A) can be held easily and smoothly with one handle operation.

Furthermore, a drive mechanism (12B) for the above-mentioned clamping operation is provided.
one handle (12a) and a bevel gear (12c), and a pair of bevel gears (12c) meshing with the bevel gear (12c).
2d), (12e), these bevel gears (12d),
Screw shaft (12f) slidably fitted to (12e)
- By combining (12g), both side walls (2A) of the U-shaped groove (2) can be easily and smoothly clamped with one handle operation.

In the clamping operation of both side walls (2A) of this U-shaped groove (2), the reversal axis adjustment mechanism (1) using the elongated hole (14)
3), the bases of the left and right clamping bodies (12A) can be moved along the elongated holes (14) formed in the clamp body (8), so that the interval between the U-shaped grooves (2) can be reduced. Even if they are different, the left and right clamping bodies (12A) and the clamping cam body (12m
) (12n) and automatically remove the U-shaped groove (2).
The both side walls (2A) of the U-shaped groove (2) can be tightened from the inside and outside in the middle.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the embodiment of the long concrete 1-U-shaped groove dedicated clamp used in the vertical reversal method of the long concrete 1-U-shaped groove of the present invention will be described based on FIGS. 1 to 3.

As shown in FIG. 1, a pair of long concrete U-shaped groove dedicated clamps (1) are used to clamp both side walls near both left and right ends of a concrete U-shaped groove (2). These clamps (1) are suspended by a pair of lower wire ropes (3) as hanging means, and these lower wire ropes (3) are supported on a balance (4), which is in turn connected to the upper wire. It is latched to a crane (6) by a rope (5).

A pair of the clamps (1) are used, but since they have the same configuration, one of them will be described in detail below with reference to FIGS. 2 and 3.

The clamp bodies (8) are respectively attached to the holders (7) supported by the lower wire rope (3) so as to be relatively rotatable. This relatively rotatable attachment is achieved by rotation between the sleeve (9) fixed to the clamp body (8) and the holding body (7).

(10) includes the holding body (7) and the clamp body (8).
) is a thrust bearing interposed between (1
)) is the tip of the sleeve (9) and the holder (7).
This is a bearing interposed between the Metal bearings may be used instead of these bearings (1o) and (1)).

(12) is the U-shaped groove (2) in the clamp body (8);
) is a clamping means for clamping both ends of the

This clamping means (12) includes a pair of clamping bodies (12A) that clamp the opposing side wall portions (2A) from both sides, and a drive mechanism (12A) that clamps and releases the clamping bodies (12A).
12B).

The drive mechanism (12B) includes a handle (12a), a drive shaft (12b) fixed to the handle (12a) and inserted through the sleeve (9), and a bevel gear fixed to the tip of the drive shaft (12b). (12c), left and right bevel gears (12d) and (12e) that mesh with this bevel gear (12c) and are rotatable only, screw shafts (12'') fixed to these left and right bevel gears (12d) and (12e), respectively. (12g), these screw shafts (12f), movable shafts (12h) coaxially screwed together with (12g), (12i), these movable shafts (12g),
12h) - Holding frame (12j) that prevents rotation of (12i) and only allows sliding (12j) - (12k
).

The drive mechanism (12B) includes a handle (12a), a handle (12a), and a handle (12a), as shown in FIG.
The drive shaft (12b) fixed to the drive shaft (12a), this drive shaft (
A bevel gear (12c) is fixed to the tip of the bevel gear (12b), and left and right bevel gears (12d) and (12e) are provided to mesh with this bevel gear (12c) and rotate freely.
, consisting of screw shafts (12f) and (12g) that are slidably fitted (key grooves or splines) into these left and right bevel gears (12d) and (12e), respectively, and the screw shafts (12f) and (12g) ) is the clamping frame (12j)
- It may be replaced with a structure in which they are screwed into (12k), respectively.

The holding body (12A) has the movable shaft (12h) (
Clamping cam body (12m) installed at the tip of 12i)
・(12n) and the movable shaft (12h)・(12
(12j) and (12k) which hold the material so as to prevent the rotation of i) and only allow sliding.
) and the clamping cam body (12 m) ・(12
n) and directly sandwich the side walls (2A) of the U-shaped groove (2), respectively.

(13) The clamping means (12) is connected to the U-shaped groove (2).
) is an inversion axis adjustment mechanism that allows position change adjustment in the width direction. In this embodiment, a bolt (12
D), and its bolt (12D) is inserted into the elongated hole (14) formed in the clamp body (8) and fixed with a nut via the stopper (12E), and the elongated hole The position of the holding body (12A) can be freely changed and fixed along (14).

At the same time, this reversal axis adjustment mechanism (13) is used when the sizes of the target U-shaped grooves (2) are significantly different, and when the drive mechanism (12B) cannot be tightened in time for the operating stroke. Using this mechanism, the holding body (1
It also plays the role of changing the position of 2A) to make it correspond.

(15) is a lock handle as a means for restricting and releasing the reversal of the U-shaped groove (2), which is pivotably mounted on the holder (7) and has an operating end thereof. A lock pin (15a) is pivotally supported, and the lock pin (15a)
is configured to pass through a pin hole drilled in the holder (7) and engage with a support arm (16) extending in a direction orthogonal to the approximately middle portion of the clamp body (8). This lock handle (15) makes it possible to engage the lock pin (15a) when setting the clamp (1) to prevent it from inadvertently turning over immediately even if it is hung. and work can be done safely.

Furthermore, by forming the support arm (16) in an L-shape with a side surface, the bent portion can be brought into contact with the back surface of the bottom portion of the U-shaped groove (2), and the U-shaped Groove (2)
When inverted, this U-shaped groove (2) can be supported from below, and together with the sandwiching of both side walls (2A) of the U-shaped groove (2), it can be hung strongly and safely. It is.

In addition, the left and right holding bodies (12) located at both ends of the U-shaped groove (2)
) (2 pairs of 4 pieces) by adjusting the width direction position of the U-shaped groove (2) and adjusting the height position of the U-shaped groove (2) with respect to the side wall (2A). It may be changed.

For example, the rotation axis for the reversal passes through the center of gravity of the U-shaped groove (2) in a cross-sectional view of the U-shaped groove (2), but the longitudinal axis passes through the center of the groove width of the U-shaped groove (2). Before the U-shaped groove (2) is reversed, the rotation axis for the reversal is slightly inclined in a plan view with respect to the direction axis, and the U-shaped groove (2) is slightly inclined in a plan view. (2) below the center of gravity of the groove and passing through the center of the groove width;
) Before the reversal, the rotation axis for the reversal is below the center of gravity of the U-shaped groove (2) in a cross-sectional view of the U-shaped groove (2), and is within the groove width of the U-shaped groove 2. For example, it may be slightly inclined in plan view with respect to the longitudinal axis passing through the center.

〔effect〕

According to the method of vertically reversing a long concrete U-shaped groove and the clamp exclusively used for the long concrete U-shaped groove according to the present invention, the following effects are achieved.

According to the method of claim (1), when a long concrete U-shaped groove that has been carried out from a factory and is in a downward facing state is grounded at a construction site at a work site, the center of gravity of this U-shaped groove in a cross-sectional view is Since the vertical direction is reversed by rotating around the central longitudinal axis, there is no need for space (in the height direction) for reversing compared to the conventional method of reversing vertically. It can be easily reversed without being limited by the reversing space, such as in narrow work sites.

In addition, when reversing, it is possible to eliminate the conventional effort of drilling holes for reversing pins and filling the holes, thereby significantly improving work efficiency.

According to the method of claim (2), the rotation is performed around a longitudinal axis with a point deviated from the center of gravity in a cross-sectional view of the U-shaped groove as the center of rotation. This has the effect that the concrete U-shaped groove can be easily reversed using its own weight.

According to the clamp of claim (3), when reversing a U-shaped groove, there is no need for a large space in the vertical direction, and there is no need for the conventional effort of drilling a hole for a reversing pin or filling the hole. With a simple structure consisting of a pair of holders at both ends of the U-shaped groove and a clamp main body that rotates relative to these, the clamp can be easily removed from the lower wire rope and can greatly improve work efficiency. This has the effect that the U-shaped groove can be easily rotated around its longitudinal axis without changing the above configuration.

According to the clamp of claim (4), by providing an inversion axis adjustment mechanism that allows one of the pair of clamping means to change its position in the width direction of the U-shaped groove, the U-shaped groove can be adjusted. It has the effect of being eccentric from the center of gravity and easily being reversed by utilizing the inclination of the U-shaped groove due to its own weight.At the same time,
Since the reversal axis adjusting mechanism can be displaced relative to the U-shaped groove during the clamping operation, the axis for reversing can be automatically adjusted in the width direction of the U-shaped groove, and the width of the U-shaped groove can be adjusted. Centering can be easily achieved even in different cases.

According to the clamp of claim (5), by providing a lock handle that restricts and releases the restriction on the reversal of the U-shaped groove, the U-shaped groove is prevented from being inadvertently reversed when lifted, and the reversing operation is facilitated. By performing this by an intentional movement of the worker, the safety of the work can be improved.

According to the clamp of claim (6), the drive mechanism for clamping the left and right side walls of the U-shaped groove includes a handle, a bevel gear, a screw shaft, and a movable shaft. , the effect is that it can be held easily and smoothly with a single handle operation.

According to the clamp of claim (7), the drive mechanism for the U-shaped groove clamping operation includes a handle, a drive shaft fixed to the handle, a bevel gear fixed to the tip of the drive shaft, and a drive mechanism meshing with the bevel gear. The left and right bevel gears are provided so that they can only rotate freely, and the screw shafts are slidably fitted to the left and right bevel gears, respectively, and the screw shafts are screwed into the clamping frame. The effect is that the clamping operation can be easily and smoothly performed by operating one handle.

[Brief explanation of the drawing]

The drawings show an embodiment of a clamp exclusively for long concrete U-shaped grooves used in the method for vertically reversing long concrete U-shaped grooves according to the present invention, and FIG. A side view, FIG. 2 is an enlarged perspective view of the main part after inversion of the U-shaped groove, FIG. 3 is a partially cutaway plan view of the main part, and FIG.
An enlarged cross-sectional view of the main parts showing a modified example of the drive mechanism, FIGS. 5 to 7 show a conventional example, FIG. 5 is an overall perspective view showing the clamp, and FIG. 6 shows another clamp. Whole perspective view,
FIG. 7 is an overall perspective view showing a conventional reversing method. 2... Concrete U-shaped groove, 3... Holding body, 8... Clamp body, 12...
- Holding means, 2A... side wall portion, 12A... holding body, 12B... drive mechanism.

Claims (7)

[Claims] (1) Suspend the long concrete U-shaped groove (2) and
Long concrete U that reverses the vertical direction of the groove (2)
A method for vertically reversing the U-shaped groove (2), comprising:
At both ends of the U-shaped groove (2), at least the opposing side wall portions (2A) are sandwiched, and the U-shaped groove (2) is formed around the longitudinal axis around the center of gravity in a cross-sectional view of the U-shaped groove (2). 2) A method for vertically reversing a long concrete U-shaped groove, which is characterized by rotating and reversing the vertical direction. (2) Longitudinal axis centering on a point where the vertical direction of the long concrete U-shaped groove (2) is shifted from the center of gravity in a cross-sectional view of this U-shaped groove (2) 2. The method for vertically reversing a long concrete U-shaped groove according to claim 1, wherein the vertically reversing method is performed in a circular motion. (3) Long concrete U-shaped groove (
2) is a clamp (1) exclusively for long concrete U-shaped grooves that suspends the U-shaped groove (2) and reverses the vertical direction of the U-shaped groove (2), wherein both ends of the U-shaped groove (2) are supported by the hanging means. A pair of holding bodies (7) are attached to the clamp body (8), respectively.
The clamp body is mounted so as to be relatively rotatable around a longitudinal axis with the center of gravity of the U-shaped groove (2) in a cross-sectional view or a point offset from this center of gravity as the rotation center. (8) is provided with a pair of clamping means (12) for clamping both ends of the U-shaped groove (2), and each clamping means (12) is provided with a pair of clamping means (12) for clamping at least the opposing side wall portions (2A) from both sides. A clamp exclusively for long concrete U-shaped grooves, characterized in that it is comprised of a body (12A) and a drive mechanism (12B) for clamping and releasing the clamping bodies (12A). (4) An inversion axis adjustment mechanism (13) using a long hole is provided so that at least one of the pair of clamping means (12) can change its position in the width direction of the U-shaped groove (2). The clamp exclusively for long concrete U-shaped grooves according to claim (3). (5) At least one of the pair of holding bodies (7) is provided with a lock handle (15) for regulating and releasing the regulation from reversing the U-shaped groove (2).
Clamp specifically for long concrete U-shaped grooves described in 3). (6) The drive mechanism (12B) is a handle (12a)
, a drive shaft (12b) fixed to this handle (12a)
), a bevel gear (12c) fixed to the tip of this drive shaft (12b), and a left and right bevel gear (12d) that meshes with this bevel gear (12c) and is rotatably provided.
(12e), these left and right bevel gears (12d), (12
screw shafts (12f) and (12g) fixed to e), respectively;
Movable shafts (12h) and (12i) coaxially screwed into these screw shafts (12f) and (12g), respectively, prevent rotation of these movable shafts (12h) and (12i) and only allow sliding. The clamp exclusively for long concrete U-shaped grooves according to claim 3 or 4, characterized in that the clamp is comprised of clamping frames (12j) and (12k) for holding the long concrete U-shaped groove. (7) The drive mechanism (12B) is a handle (12a)
, a drive shaft (12b) fixed to this handle (12a)
), a bevel gear (12c) fixed to the tip of this drive shaft (12b), and a left and right bevel gear (12d) that meshes with this bevel gear (12c) and is rotatably provided.
(12e), these left and right bevel gears (12d), (12
e) screw shafts (12f) and (
(12g), and the screw shaft (12f) and (12g).
The clamp exclusively for long concrete U-shaped grooves according to claim 3 or 4, characterized in that g) is screwed into the clamping frames (12j) and (12k), respectively.