JP2000291121A - Concrete inside-hanging clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp usable for both inside-hanging of a U-shaped ditch block and inside-hanging of a VS side-ditch block. SOLUTION: This concrete inside-hanging clamp has a hanging ring 10, a connecting member 13 extending almost horizontally, a pair of cams 15a, 15b rotatably journalled to both ends of the connecting member 13, and a pair of cam links 12a, 12b connected between a hanging ring bolt 11 and one ends of the cams 15a, 15b. In this case, a pair of locking means 38 that can take a storage position of being stored within the whole width of the clamp and a protruding position of protruding outward over the whole width of the clamp are provided in proximity to the upper parts of a pair of cams 15a, 15b. When used for inside-hanging of a U-shaped ditch block, the locking means are placed in the storage position, and the clamp is used in the state of being placed on the bottom face part. When used for inside-hanging of a VS side-ditch block, the locking means are placed in the protruding position, and the clamp is used in the state of being placed on the stepped face or upper face of an internal wall surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal suspension clamp suitable for lifting a concrete product used as a road gutter, and more particularly, to an internal suspension of a U-shaped groove concrete block and a VS side groove concrete block. The present invention relates to a dual-purpose clamp.

[0002]

2. Description of the Related Art A concrete product used as a road gutter has a U-shaped groove concrete block (FIG. 9) having a bottom surface and a substantially U-shaped cross section, and a substantially inverted U-shaped cross section. There is a VS side groove concrete block (FIG. 8) having an opening on the upper surface.

Various types of internal suspension clamps used for laying the internal suspension clamps of U-shaped groove concrete blocks have been developed and put into practical use. Also, V
For the S-side groove concrete block, a large-sized dedicated clamp has been developed to be suspended inside using the opening on the upper surface.

[0004]

Conventionally, however, it is necessary to use a dedicated clamp for the inside suspension of the U-shaped groove block and the inside suspension of the VS side groove block, respectively.
Clamps that can also be used for hanging these blocks inside have not been developed. For this reason, when both concrete gutter blocks are laid on one site, two different types of clamps must be used for each, and the work efficiency is poor and cost has been a major problem. .

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clamp which can be used both for suspending a U-shaped groove block and suspending a VS side groove block.

That is, a clamp for suspending in concrete according to the present invention comprises a suspension ring, a connecting member extending in a substantially horizontal direction, a pair of cams rotatably supported at both ends of the connection member, and a pair of cams. In a concrete suspension clamp having a pair of cam links respectively connected between a suspension ring bolt provided at the lower end and one end of the cam,
A pair of locking means are provided near the upper part of the pair of cams so as to be able to take a storage position stored within the full width of the clamp and a projecting position protruding outward beyond the full width of the clamp. (Claim 1).

According to a second aspect of the present invention, in the clamp for suspending in concrete according to the first aspect, each of the pair of locking means includes a guide fixed to an end of the connecting member, and a substantially horizontal direction in the guide. It is characterized in that it has a slidable locking fitting and fixing means for fixing the locking fitting to the storage position or the protruding position.

According to a third aspect of the present invention, there is provided the hanging clamp in concrete according to the second aspect, wherein the fixing means comprises a bolt inserted into the guide, and the lower end portion of the bolt is located at a position corresponding to the storage position or the projecting position of the locking metal. Is formed in the metal fitting.

According to a fourth aspect of the present invention, in the clamp for suspending in concrete according to the second or third aspect, each of the pair of locking means is further provided with a stopper means for preventing the locking metal from falling off the guide. It is characterized by the following.

According to a fifth aspect of the present invention, in the clamp for suspending in concrete according to any one of the first to fourth aspects, the length of the connecting means is adjustable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clamp for suspending in concrete according to an embodiment of the present invention will be described below with reference to FIGS.

At the lower end of the suspension ring 10, a suspension ring bolt 11 is provided, and a pair of cam links 12a,
Each end of 12b is connected. Cam link 12a,
The other end of 12b is connected to one end of a pair of cams 15a, 15b rotatably supported by cam bolts 14a, 14b at both ends of a shaft 13 whose length is adjustable.
These suspension rings 10, suspension ring bolts 11, cam links 12a,
The operating body 16 is constituted by the shaft 12b, the shaft 13, the cam bolts 14a and 14b, and the cams 15a and 15b, and the clamp is provided with a pair of operating bodies 16 and 16. As is clear from FIG. 2, the pair of operating bodies 16, 16
A connecting shaft 17 for connecting the upper ends of 0, 10 to each other, and a connecting shaft 18 for screwing the suspension ring bolts 11, 11 to both ends.
And connecting bolts 14a and 14b are connected at predetermined intervals by connecting shafts 19 which are screwed to both ends, respectively.
Synchronize and work together.

In each operating body 16, a shaft 13a,
A support member 37 is fixed to an upper surface of the support member 13b, and a locking member 38 extending in a substantially horizontal direction is slidably incorporated in a guide 39 fixed to an upper portion of the support member 37.
Further, referring to FIGS. 3 and 4, the locking fitting 38 is fixed to the guide 39 by the wing bolt 42, but can be freely slid in the left-right direction when the wing bolt 42 is loosened. 3 and the position of FIG. 4 which is housed inside the clamp (in the direction of arrow B) protruding outward (in the direction of arrow A). Locking grooves 43a and 43b are provided to allow the lower end of the wing bolt 42 to be fitted therein. In FIG. 1, a pair of locking fittings 38, 38 are shown as being in the position of FIG. 4 housed inside the clamp. In addition, stoppers 40 and 41 for preventing falling off from the guide 39 are formed at both ends of the locking fitting 38, and a spring 44 for preventing disengagement and detachment is incorporated in the wing bolt 42.

On the other hand, the support 20 has a support plate 23 having an upper long groove 21 and a lower long groove 22 extending substantially vertically.
Having. The suspension ring bolt 11 is provided in the upper slot 21
And can be moved substantially vertically along the upper long groove 21. A pair of first slide links 25a, 2
5b, arm bolts 24a, 24b
The shaft 13 is connected to the shaft 13 by cam bolts 14a and 14b, respectively. First slide link 25a, 25b
A pair of second slide links 26a, 26
b are connected at one end. 2nd slide link 2
The other end of each of 6a and 26b is pivotally attached to a slide bolt 27 that can move in the lower long groove 22 of the support plate 23. These support plate 23, first slide link 25a,
25b, a support body 20 composed of second slide links 26a and 26b, a slide bolt 27, and the like are provided.
As is clear from FIG. 2, the arm bolts 24a, 24b
Connecting shaft 28 and support plate 23,
23 are connected at a predetermined interval by a connecting shaft 29 connecting the lower ends of the 23, and interlock in synchronization with each other.

In the illustrated embodiment, the first slide links 25a, 25b extend further downward beyond the cam bolts 14a, 14b, and the axle 3 is provided at the lower end thereof.
0 and wheels 31a and 31b are rotatably mounted. This facilitates running of the clamp.

As is apparent from the above description, each of the clamps comprises a pair of operating bodies 16 and a support 20, and the first slide links 25a, 2a on the support 20.
5b are connected to the cam bolts 14a,
The suspension ring bolt 11, which is connected to the support ring 14 b and serves as an opening and closing fulcrum for the cam links 12 a, 12 b in the operating body 16, is movably accommodated in the upper long groove 21 of the support plate 23 in the support body 20. The operating body 16 and the support 20 are integrated. The operating body 16 performs a clamp opening / closing operation, and the support 20 stably supports the operating body 16.

FIGS. 1 and 2 show a state in which the clamp is closed. At this time, the suspension ring bolt 11 is located near the lower end of the upper long groove 21 of the support plate 23. In this state, the clamp is placed in the U-shaped groove or the VS side groove of the concrete product to be lifted.

When the suspension ring 10 is lifted from this state, the suspension ring bolt 11 moves upward along the upper long groove 21, and the pair of cam links 12a and 12b rotate in the direction in which they close each other. , 15b rotate in directions to open each other about the cam bolts 14a, 14b as fulcrums. Thus, the cams 15a and 15b are at the positions indicated by phantom lines in FIG. 1, and the cams 15a and 15b
The engagement teeth (not shown) formed on the outer periphery of the gear mesh with each other to allow the concrete product to be lifted.

In the clamp of the illustrated embodiment, the concrete blocks are lifted by the clamps and then landed at predetermined positions so that the cams 15a and 15b are automatically operated when the load acting on the clamps becomes zero. Although an automatic attachment / detachment mechanism 45 for releasing the work is incorporated to improve work efficiency, the explanation is omitted because it is not directly related to the subject of the present invention. The automatic attachment / detachment mechanism 45 is described in detail in Japanese Patent Application No. 10-32422 filed by the present applicant.

The clamp of the illustrated embodiment can be used for both the inside suspension of the VS side groove concrete block and the inside suspension of the U-shaped groove concrete block. FIG. 5 shows a case where the VS side groove concrete block 35 is used for hanging inside, and FIG. 6 shows a case where the U-shaped groove concrete block 36 is used for hanging inside. The major difference between the two types of concrete blocks is that the U-shaped groove block 36 has a bottom surface but the VS-side groove block 35 has no bottom surface. In FIG. 6, the hanging operation can be performed in a stable posture with the clamp placed on the bottom surface portion. However, in the case of hanging the VS side groove block 35 in FIG.
The inner wall must be suspended at a position on the inner wall surfaces W ′ and W ′ of the side groove block 35 in the groove depth direction.

A lock 38 slidably provided in a guide 39 above the support member 37 in each operating body 16 has a V
This works effectively when the S-side groove block 35 is suspended inside. In this case, as shown in FIG. 5, a state in which the pair of locking fittings 38, 38 is projected outside the clamp (FIG. 3).
The studs are fixed to the guide 39 by the wing bolt 42 and the locking groove 43b, and the locking fittings 38, 38 are placed on the step surfaces S, S facing the opening of the VS side groove block 35, thereby stabilizing the posture of the clamp. In this state, internal suspension can be performed. Alternatively, although not shown, the locking fittings 38, 3
8 may be suspended in a state of being placed on the upper surfaces S ′, S ′ remaining outside the opening of the VS side groove block 35.

When used for hanging the U-shaped groove block 36 inside, as shown in FIG.
8 is fixed to the guide 39 by the wing bolt 42 and the locking groove 43a in a state of being housed inside the clamp (FIG. 4).
In this state, the locking fittings 38, 38 do not protrude outside the clamp, so that the clamp is connected to the U-shaped groove block 3.
There is no hindrance when storing and placing in the 6.

Further, this clamp has an inner dimension (inner wall W,
It can be widely used for lifting concrete products having different W or intervals between W ′ and W ′). This is achieved by the fact that the length of the shaft 13 is adjustable. In the illustrated embodiment, the shaft 13 has cams 15a, 14b at its outer ends via cam bolts 14a, 14b, respectively.
A pair of small diameter shafts 13 rotatably supporting the shaft 15b
a, 13b, and a large-diameter central shaft 13c for accommodating the inner ends of the small-diameter shafts 13a, 13b, respectively. One pin insertion hole (shown in the figure) is provided in the inner end of each of the small-diameter shafts 13a, 13b. ), And several pin adjustment holes are provided at both ends of the large-diameter central shaft 13c. And the small diameter shafts 13a, 13
The shafts 13a to 13c are connected and integrated by inserting and removing the pin 34 into the pin insertion hole b and the pin adjustment hole at the position selected on the large-diameter central shaft 13c. By using pin adjustment holes at different positions in the large-diameter central shaft 13c, this shaft 13c
Of the inner ends of the small-diameter shafts 13a, 13b with respect to the
The length of the can be adjusted.

For example, two pin adjustment holes 32a, 32b; 33a, 33 are provided at both ends of the large-diameter central shaft 13c, respectively.
7B, the small diameter shafts 13a and 13b are connected using the outer pin adjustment holes 32a and 33a, respectively, as shown in FIG. 7A, and as shown in FIG. 7B. One is for connecting small diameter shafts using the outer (33a) and the other is for inner (32b) pin adjustment holes,
As shown in FIG. 7 (C), each of the inner pin adjustment holes 32
b and 33b can be used to connect the small diameter shafts, and the shaft 13 can be obtained in three different lengths.

It is preferable that the shaft 13 can be finely adjusted in a wide range. This can be achieved by providing a large number of adjustment holes at both ends of the large-diameter central shaft 13c at a small interval, or by adjusting the small-diameter shafts 13a and 13b. By providing a plurality of pin adjustment holes at the inner end portion, or preparing a member having a plurality of lengths for the members constituting these shafts, particularly the large-diameter central shaft 13c, and appropriately replacing and using them. Or by using them together.

The present invention is not limited to the illustrated embodiment described above, and various changes can be made within the scope of the claims. For example, the locking fitting 38 in the illustrated embodiment has a pin shape, but a steel plate or any other shape may be used. As a means for moving the latch 38 between the storage position and the protruding position, a configuration in which the inside of the guide 39 used in the illustrated embodiment is slid is considered to be simple and suitable. Then, a configuration in which the latch is rotated in a substantially horizontal plane, a configuration in which the latch at a protruding position (FIGS. 3 and 5) is rotated by 90 degrees in a substantially vertical plane, and moved to a storage position in which the latch is upright or hung, etc. May be adopted.

[0027]

According to the present invention, when used for suspending a U-shaped groove block inside, the operation is performed in a state in which the locking fitting is stored in the full width of the clamp, and the VS side groove block is used. When used for internal suspension, in any case by operating with the locking fitting protruded to the outside of the clamp and locked on the step surface or top surface of the inner wall of the block, Smooth internal suspension work can be performed.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a concrete suspension clamp according to an embodiment of the present invention.

FIG. 2 is a side view of the clamp.

FIG. 3 is an enlarged partial view showing a state in which a locking metal is projected outward of the clamp in the same clamp.

FIG. 4 is an enlarged partial view showing a state in which a locking fitting is in a storage position in the clamp.

5 is an explanatory view showing a state in which the clamp is used as a protruding position in FIG. 3 to suspend the VS side groove block inside.

FIG. 6 is an explanatory view showing a state in which the U-shaped groove block is suspended internally using the same clamp as a storage position in FIG. 4;

FIG. 7 is an explanatory view showing a variation of a connection configuration and a length adjustment of a shaft of the clamp.

FIG. 8 is a perspective view showing a VS side groove block.

FIG. 9 is a perspective view showing a U-shaped groove block.

DESCRIPTION OF SYMBOLS 10 Suspension ring 11 Suspension ring bolt 12a, 12b Cam link 13 Shaft with adjustable length 13a, 13b, 13d Small diameter shaft 13c, 13e Large diameter shaft 14a, 14b Cam bolt 15a, 15b Cam 16, 16 'Working body 20 Support 21 Support plate 22 Upper long groove 23 Lower long groove 24a, 24b Arm bolt 25a, 25b First slide link 26a, 26b Second slide link 27 Slide bolt 31a, 31b, 32a, 32b Pin adjustment hole 34 Pull-out pin 35 VS Side groove block 36 U-shaped groove block 37 Supporting material 38 Locking bracket 39 Guide 40, 41 Stopper 42 Wing bolt 43a, 43b Locking groove 44 Spring 45 Automatic attaching / detaching mechanism W Inner wall surface of U-shaped groove block W 'Inside of VS side groove block Wall S VS side Step surface of inner wall of groove block S 'Upper surface of VS side groove block

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hatsuo Tsuyama 2-3-12 Tomiokita, Nara-shi, Nara F-term in Eagle Clamp Co., Ltd. (Reference) 2D063 CA46 3F004 AA07 AB06 AB12 AD07 AF01 AG03 EA14

Claims (5)

[Claims] 1. A suspension ring, a connecting member extending in a substantially horizontal direction, a pair of cams rotatably supported at both ends of the connection member, a suspension ring bolt provided at a lower end of the suspension ring, and the cam. And a pair of cam links connected to one end of the
A pair of locking means are provided near the upper part of the pair of cams so as to be able to take a storage position stored within the full width of the clamp and a projecting position protruding outward beyond the full width of the clamp. And a clamp for suspension in concrete. Each of said pair of locking means includes a guide fixed to an end of said connecting member, a locking metal slidable substantially horizontally in said guide, and said locking means. The clamp for suspending in concrete according to claim 1, further comprising fixing means for fixing the metal fitting to the storage position or the protruding position. 3. The locking means comprises a bolt inserted into the guide, and a locking groove for fitting a lower end of the bolt at a position corresponding to the storage position or the projecting position of the locking metal fitting. 3. The hanging clamp in concrete according to claim 2, wherein the hanging clamp is formed on a locking fitting. 4. A concrete structure according to claim 2, wherein each of said pair of locking means is further provided with stopper means for preventing said locking metal from falling off from said guide. Hanging clamp. 5. The clamp according to claim 1, wherein said connecting means is adjustable in length.