JP4177930B2 - Clamp for hanging in concrete - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an internal suspension clamp suitable for lifting concrete products used as road side grooves, and more particularly to a clamp that can be used both for internal suspension of U-shaped groove concrete blocks and internal suspension of VS side groove concrete blocks.
[0002]
[Prior art]
Concrete products used as road side grooves include a U-shaped groove concrete block (FIG. 9) having a bottom surface and a substantially U-shaped cross-section, and an opening on the upper surface formed in a substantially inverted U-shaped cross-sectional shape. There is a VS side groove concrete block having (FIG. 8).
[0003]
Various types of internal suspension clamps used for laying an internal suspension clamp for a U-shaped groove concrete block have been developed and put to practical use. Moreover, about the VS side groove concrete block, the large-sized exclusive clamp which hangs inward using the upper surface opening part is developed.
[0004]
[Problems to be solved by the invention]
However, conventionally, it is necessary to use dedicated clamps for the internal suspension of the U-shaped groove block and the internal suspension of the VS side groove block, and a clamp that can also be used for the internal suspension of these blocks has 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, resulting in poor work efficiency and high cost. .
[0005]
[Means for Solving the Problems]
Therefore, an object of the present invention is to provide a clamp that can be used both as an internal suspension of a U-shaped groove block and an internal suspension of a VS side groove block.
[0006]
That is, the concrete internal suspension clamp according to the present invention is provided with 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 lower end of the suspension ring. A concrete hanging clamp having a hanging ring bolt and a pair of cam links respectively connected between one end of the cam, and is accommodated within the full width of the clamp, close to the upper side of the pair of cams. A pair of locking means capable of taking the storage position and the protruding position protruding outward beyond the entire width of the clamp is provided (Claim 1).
[0007]
According to a second aspect of the present invention, in the concrete hanging clamp according to the first aspect, each of the pair of locking means is fixed to the end of the connecting member, and can slide in the horizontal direction in the guide. And a fixing means for fixing the locking metal fitting to the storage position or the protruding position.
[0008]
According to a third aspect of the present invention, in the concrete internal suspension clamp according to the second aspect, the fixing means includes a bolt inserted into the guide, and the lower end of the bolt is fitted at a position corresponding to the storage position or the protruding position of the locking metal fitting. A locking groove is formed in the locking metal fitting.
[0009]
According to a fourth aspect of the present invention, in the concrete hanging clamp 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 fitting from falling off the guide. And
[0010]
A fifth aspect of the present invention is the clamp for hanging concrete in any one of the first to fourth aspects, wherein the length of the connecting means is adjustable.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A concrete hanging clamp according to an embodiment of the present invention will be described below with reference to FIGS.
[0012]
A suspension ring bolt 11 is provided at the lower end of the suspension ring 10, and one end of each of the pair of cam links 12 a and 12 b is connected to the suspension ring bolt 11. The other ends of the cam links 12a and 12b are connected to one ends of a pair of cams 15a and 15b rotatably supported by cam bolts 14a and 14b at both ends of a shaft 13 that can be adjusted in length. The suspension ring 10, the suspension ring bolt 11, the cam links 12a and 12b, the shaft 13, the cam bolts 14a and 14b, and the cams 15a and 15b constitute an operating body 16, and the clamp is provided with a pair of operating bodies 16 and 16. As apparent from FIG. 2, the pair of operating bodies 16, 16 includes a connecting shaft 17 that connects the upper ends of the suspension rings 10, 10, a connection shaft 18 that screws the suspension ring bolts 11, 11 to both ends, and a cam bolt 14a, 14b are connected to each other by connecting shafts 19 which are screwed to both ends, and are synchronized with each other.
[0013]
In each operating body 16, a support member 37 is fixed to the upper surfaces of the shafts 13a and 13b, and a locking member 38 extending in a substantially horizontal direction is slidable in a guide 39 fixed to the upper part of the support member 37. Built in. Further, referring to FIGS. 3 and 4, the locking metal fitting 38 is fixed to the guide 39 by the butterfly bolt 42. However, when the butterfly bolt 42 is loosened, it can be freely slid in the left-right direction. Can be taken from two positions: the position of FIG. 3 that protrudes outward (in the direction of arrow A) and the position of FIG. 4 that is housed inward of the clamp (in the direction of arrow B). Locking grooves 43a and 43b that allow the lower end of the butterfly bolt 42 to be fitted are provided. In FIG. 1, a pair of locking fittings 38, 38 are shown as being in the position of FIG. 4 housed inside the clamp. Note that stoppers 40 and 41 are formed at both ends of the lock fitting 38 to prevent the locking bracket 38 from coming off from the guide 39, and the butterfly bolt 42 is incorporated with a spring 44 to prevent it from coming off.
[0014]
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 in a substantially vertical direction. The suspension ring bolt 11 passes through the upper long groove 21 of the support plate 23, and can move in the substantially vertical direction along the upper long groove 21. A pair of first slide links 25a and 25b are connected to the support plate 23 by arm bolts 24a and 24b, and to the shaft 13 by cam bolts 14a and 14b, respectively. One end of a pair of second slide links 26a and 26b is connected to a substantially middle portion of the first slide links 25a and 25b, respectively. Each of the other ends of the second slide links 26 a and 26 b is pivotally attached to a slide bolt 27 that can move in the lower long groove 22 of the support plate 23. A support body 20 constituted by the support plate 23, the first slide links 25a, 25b, the second slide links 26a, 26b, the slide bolts 27, and the like is provided. As is clear from FIG. 2, the arm bolts 24a, 24b are provided. The connecting shaft 28 is screwed to both ends and the connecting shaft 29 is connected to the lower ends of the support plates 23 and 23 to be connected to each other at a predetermined interval.
[0015]
In the illustrated embodiment, the first slide links 25a, 25b extend further downward beyond the cam bolts 14a, 14b, and the axle 30 and the wheels 31a, 31b are rotatably attached to their lower ends. This facilitates traveling of the clamp.
[0016]
As is apparent from the above description, each clamp is composed of a pair of operating bodies 16 and a support body 20, and one ends of the first slide links 25 a and 25 b in the support body 20 are cam bolts 14 a and 14 b in the operating body 16. The suspension ring bolts 11 that are connected to each other and serve as the opening and closing fulcrums of the cam links 12a and 12b in the operating body 16 are movably accommodated in the upper long groove 21 of the support plate 23 in the support body 20, thereby The body 16 and the support body 20 are integrated. The operating body 16 performs a clamp opening / closing operation, and the support body 20 stably supports the operating body 16.
[0017]
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 a U-shaped groove or a VS side groove of a concrete product to be lifted.
[0018]
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 a direction to close each other, and the cams 15a and 15b are moved accordingly. The cam bolts 14a and 14b are rotated in directions of opening with each other as fulcrums. Thus, the cams 15a and 15b are in positions indicated by phantom lines in FIG. 1, and engaging teeth (on the outer wall surfaces of the cams 15a and 15b are formed on the inner wall surfaces W and W or W ′ and W ′ (both described later) of the concrete product). (Not shown) mesh and allow the concrete product to be lifted.
[0019]
The clamp of the illustrated embodiment automatically releases the cams 15a and 15b when the concrete block is lifted by the clamp and then landed at a predetermined position so that the load acting on the clamp becomes zero. The automatic attachment / detachment mechanism 45 is incorporated to improve the work efficiency, but is not directly related to the subject matter of the present invention, so that the description thereof is omitted. The automatic attachment / detachment mechanism 45 is described in detail in Japanese Patent Application No. 10-32422 by the present applicant.
[0020]
The clamp of the illustrated embodiment can be used both for the internal suspension of the VS side groove concrete block and the internal suspension of the U-shaped groove concrete block. FIG. 5 shows a case where the VS side groove concrete block 35 is used for internal suspension, and FIG. 6 shows a case where the VS side groove concrete block 35 is used for internal suspension. The major difference between the two types of concrete blocks is that the U-shaped groove block 36 has a bottom surface portion, but the VS side groove block 35 does not have a bottom surface portion. In FIG. 6, the inner suspension work can be performed in a stable posture with the clamp placed on the bottom surface portion. However, in the case of the inner suspension of the VS side groove block 35 (FIG. 5), the clamp is attached to the VS side groove block 35. The inner wall must be suspended in the middle of the groove depth direction in the inner wall surfaces W ′ and W ′.
[0021]
In each operating body 16, the locking metal fitting 38 slidably provided in the guide 39 above the support member 37 works effectively when the VS side groove block 35 is suspended inside. In this case, as shown in FIG. 5, the pair of locking metal fittings 38, 38 are fixed to the guide 39 by the butterfly bolt 42 and the locking groove 43b in a state of protruding outward from the clamp (FIG. 3). By placing the fasteners 38, 38 on the stepped surfaces S, S facing the opening of the VS side groove block 35, the posture of the clamp can be stabilized, and the inner suspension can be performed in this state. Alternatively, although not shown, the locking metal fittings 38 may be hung in the state where they are placed on the upper surfaces S ′ and S ′ left outside the opening of the VS side groove block 35.
[0022]
When used to suspend the U-shaped groove block 36, as shown in FIG. 6, the pair of locking fittings 38, 38 are housed inside the clamp (FIG. 4) and the butterfly bolt 42 and locking It is fixed to the guide 39 by the groove 43a. In this state, the locking fittings 38 do not protrude outward from the clamp, so that there is no obstacle when the clamp is received and placed in the U-shaped groove block 36.
[0023]
Further, this clamp can be used for lifting concrete products having different inner dimensions (inner wall surfaces W, W or intervals between W ′ and W ′). This is achieved by making the length of the shaft 13 adjustable. In the illustrated embodiment, the shaft 13 has a pair of small-diameter shafts 13a and 13b rotatably supporting cams 15a and 15b via cam bolts 14a and 14b, respectively, and the small-diameter shafts 13a and 13b. The small-diameter shafts 13a and 13b are each provided with a pin insertion hole (not shown) and a large-diameter central shaft 13c. Several pin adjustment holes are provided at both ends. Then, the shafts 13a to 13c are connected and integrated by inserting the insertion / removal pins 34 into the pin insertion holes of the small diameter shafts 13a and 13b and the pin adjustment holes at positions selected in the large diameter central shaft 13c. By using pin adjustment holes at different positions on the large-diameter central shaft 13c, the accommodation length of the inner ends of the small-diameter shafts 13a and 13b with respect to the shaft 13c can be adjusted. Can be adjusted.
[0024]
For example, when two pin adjustment holes 32a and 32b; 33a and 33b are provided at both ends of the large-diameter central shaft 13c, the outer pin adjustment holes 32a and 33a are used as shown in FIG. When the small-diameter shafts 13a and 13b are connected to each other, and as shown in FIG. 7B, one is connected to the small-diameter shaft using the pin adjustment holes on the outside (33a) and the other is on the inside (32b). As shown in FIG. 7C, when the small-diameter shafts are connected using the inner pin adjustment holes 32b and 33b, the shafts 13 having three lengths can be obtained.
[0025]
It is preferable that the shaft 13 be finely adjustable over a wide range. This may be achieved by providing a large number of adjusting holes at narrow intervals at both ends of the large-diameter central shaft 13c, or the inner ends of the small-diameter shafts 13a and 13b. By providing a plurality of pin adjustment holes in the part, or by preparing members having these shafts, particularly those having a plurality of lengths for the large-diameter central shaft 13c and using them as appropriate, or It can be realized by using these together.
[0026]
The present invention is not limited to the illustrated embodiments described above, and various modifications can be made within the scope of the claims. For example, the locking metal fitting 38 in the illustrated embodiment has a pin shape, but a steel plate or other arbitrary shape locking metal fitting may be used. In addition, as a means for moving the locking metal fitting 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 slidable is considered to be simple and suitable. The locking bracket is rotated in a substantially horizontal plane, or the locking bracket in the protruding position (FIGS. 3 and 5) is rotated 90 degrees in a substantially vertical plane and moved to an upright or suspended storage position. It may be adopted.
[0027]
【The invention's effect】
According to the present invention, when used for suspending the U-shaped groove block, the locking bracket is operated in the storage position where it is housed within the full width of the clamp, and is used for suspending the VS side groove block. Smoothly hangs in any case by operating the locking bracket in the protruding position where it protrudes outward from the clamp and locking it to the stepped surface or top surface of the inner wall of the block. It can be performed.
[Brief description of the drawings]
FIG. 1 is a front view showing a configuration of a concrete suspending 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 the locking metal fitting protrudes outward from the clamp in the clamp.
FIG. 4 is an enlarged partial view showing a state in which the locking metal fitting is in a storage position in the clamp.
5 is an explanatory view showing a state in which the VS side groove block is suspended inward by using the clamp as a protruding position in FIG. 3; FIG.
6 is an explanatory view showing a state in which the U-shaped groove block is suspended inward using the clamp as a storage position in FIG. 4; FIG.
FIG. 7 is an explanatory diagram showing a variation of the coupling configuration and length adjustment of the 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.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Suspension ring 11 Suspension ring bolt 12a, 12b Cam link 13 Length adjustable shaft 13a, 13b, 13d Small diameter shaft 13c, 13e Large diameter shaft 14a, 14b Cam bolt 15a, 15b Cam 16, 16 'Actuator 20 Support body 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 Insertion / extraction pin 35 VS side groove block 36 U-shape Groove block 37 Support material 38 Locking bracket 39 Guide 40, 41 Stopper 42 Butterfly bolts 43a, 43b Locking groove 44 Spring 45 Automatic attachment / detachment mechanism W Inner wall surface W 'of U-shaped groove block VS side groove block SVS side groove block Step surface S 'of the inner wall of the VS side groove The top surface of the click

Claims (5)

A suspension ring, a connection 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 the lower end of the suspension ring, and one end of the cam A clamp for hanging in concrete having a pair of cam links respectively connected to each other, close to the upper side of the pair of cams, and stored outward within the full width of the clamp and beyond the full width of the clamp A clamp for hanging in concrete, characterized in that a pair of locking means capable of taking a projecting position projecting into the concrete is provided. Each of the pair of locking means includes a guide fixed to the end of the connecting member, a locking bracket that can slide in the guide in a substantially horizontal direction, and the locking bracket in the storage position. The clamp for hanging in concrete according to claim 1, further comprising a fixing means for fixing to the protruding position. The fixing means comprises a bolt inserted into the guide, and a locking groove is formed in the locking bracket for fitting the lower end of the bolt at a position corresponding to the storage position or the protruding position of the locking bracket. The concrete internal suspension clamp according to claim 2, wherein 4. The concrete suspension clamp according to claim 2 or 3, wherein each of the pair of locking means is further provided with stopper means for preventing the locking metal fitting from falling off the guide. 5. The concrete suspending clamp according to claim 1, wherein the connecting means is adjustable in length.

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