JP4153599B2 - 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 a U-shaped concrete product used as a road side groove.
[0002]
[Prior art]
Various types of internal suspension clamps have been developed and put into practical use as being suitably used for laying a U-shaped groove.
[0003]
In the internal suspension clamp, it is necessary to adjust the distance between the pair of arms that engage the concrete inner wall surface according to the inner dimension of the concrete product to be lifted (the distance between the inner wall surfaces). In conventional internal suspension clamps, there are a mechanism for opening a plurality of pin holes in the main body and adjusting the opening width depending on the insertion position of the pins, and a mechanism for adjusting the opening width by rotating a screw rod or shaft that connects the arms to each other. It has been adopted.
[0004]
[Problems to be solved by the invention]
However, the former opening adjustment mechanism has a problem that only adjustment according to the interval between the pin holes formed in the main body can be made, and fine adjustment cannot be made. The latter opening adjustment mechanism allows fine adjustment. However, when the concrete product to be lifted has a very different internal size, the screw rod and shaft must be replaced. It is difficult to handle concrete products with various internal dimensions with clamps.
[0005]
[Means for Solving the Problems]
Therefore, an object of the present invention is to provide a clamp for hanging in concrete in which the opening width can be finely adjusted over a wide range.
[0006]
That is, the concrete internal suspension clamp according to the present invention is provided with a suspension ring, a pair of shafts whose lengths can be adjusted, a pair of cams rotatably supported at both ends of the shaft, and a lower end of the suspension ring. An operating body having a pair of cam links respectively connected between a suspension ring bolt and one end of the cam, a support plate having an upper long groove and a lower long groove extending in a substantially vertical direction, the support plate, and the above A pair of first slide links connected between both ends of the shaft, a predetermined position in each of the first slide links, and a slide bolt movable in the lower long groove of the support plate. The suspension ring bolt in the operating body is movable in the upper long groove of the support plate in the support body.
[0007]
A second aspect of the present invention is the clamp for hanging concrete according to the first aspect, wherein the working body and the support body are each provided in pairs with a predetermined interval, and these are held at the predetermined interval and linked in synchronization with each other. Means are provided.
[0008]
According to a third aspect of the present invention, in the concrete hanging clamp according to the first aspect, cams are rotatably supported at both ends of the shaft via cam bolts, and one end of the first slide link is supported by the cam bolt. It is characterized by being connected.
[0009]
According to a fourth aspect of the present invention, in the clamp for hanging concrete in any one of the first to third aspects, the shaft includes a pair of first shafts each rotatably supporting a cam on an outer end thereof, and the first shafts. Each of which has a second shaft for accommodating the inner end portion thereof, and an adjusting means for adjusting the accommodation length of the inner end portion of the first shaft with respect to the second shaft.
[0010]
A fifth aspect of the present invention is the clamp for hanging concrete in any one of the first to third aspects, wherein the shaft has a first shaft that rotatably supports one cam at one end thereof, and the other end of the first shaft. And a second shaft that rotatably supports the other cam at the other end, and an adjusting means for adjusting the accommodation length of the first shaft with respect to the second shaft. To do.
[0011]
According to a sixth aspect of the present invention, in the clamp for hanging concrete in any one of the fourth or fifth aspect, the adjusting means includes at least one pin insertion hole provided in one of the first shaft and the second shaft, and a first A plurality of pin adjustment holes provided in the other of the shaft and the second shaft, and a detachable pin for connecting and integrating the first shaft and the first shaft through the pin insertion hole and the selected one pin adjustment hole; It is characterized by comprising.
[0012]
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.
[0013]
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.
[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 pair of support bodies 20 constituted by the support plate 23, the first slide links 25a and 25b, the second slide links 26a and 26b, the slide bolts 27 and the like are provided. As is apparent from FIG. 2, the arm bolts 24a and 24b are provided. Are connected at predetermined intervals by a connecting shaft 28 that is screwed to both ends and a connecting shaft 29 that connects the lower ends of the support plates 23 and 23, and are synchronized with each other.
[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 clear 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 18. The suspension ring bolts 11 that are connected to each other and serve as the opening and closing fulcrum of the cam links 12a and 12b in the operating body 18 are movably accommodated in the upper long groove 22 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 22 of the support plate 23. In this state, the clamp is placed in the U-shaped groove of the 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 22 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 the positions indicated by phantom lines in FIG. 1, and the engagement teeth (not shown) formed on the outer periphery of the cams 15a and 15b mesh with the inner wall surfaces W and W of the concrete product to lift the concrete product. Enable.
[0019]
This clamp can be generally used for lifting concrete products having different inner dimensions (interval between the inner wall surfaces W, 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.
[0020]
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. 3B, one is the outside (33a) and the other is the inside (32b). As shown in FIG. 3C, the shaft 13 having three different lengths can be obtained when both of the small-diameter shafts are connected using the inner pin adjustment holes 32b and 33b. 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.
[0021]
FIG. 4 shows a modification of the operating body in the clamp. In this operating body 16 ', the shaft 13 has a small-diameter shaft 13d that rotatably supports one cam 15a at one end via a cam bolt 14a, and the other cam 15b at one end that rotates via a cam bolt 15b. It consists of a large-diameter shaft 13e that is freely supported, and a small-diameter shaft 13d is connected and integrated by an insertion / removal pin 34 in a state where the small-diameter shaft 13d is accommodated in the large-diameter shaft 13e at the end opposite to the cams 15a and 15b. In this case, at least one pin insertion hole is provided at the insertion end of the small-diameter shaft 13d, and a plurality of pin adjustment holes are provided at the receiving end of the large-diameter shaft 13e. The shafts 34 are connected and integrated by inserting the insertion / removal pins 34 into the holes. By appropriately changing the position of the pin adjustment hole through which the insertion / removal pin 34 is inserted, the length of the shaft 13 can be changed and used for lifting concrete products having different inner dimensions.
[0022]
【The invention's effect】
According to the present invention, since the clamp arm opening width can be finely adjusted in a wide range, an internal suspension clamp that can be applied to concrete products of various internal dimensions is provided.
[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 explanatory view showing a variation of the coupling configuration and length adjustment of the shaft of the clamp.
FIG. 4 is a front view showing an operating body in a modified example of the clamp.
[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 grooves 24a, 24b Arm bolts 25a, 25b First slide links 26a, 26b Second slide links 27 Slide bolts 31a, 31b, 32a, 32b Pin adjustment hole 34 Insertion / removal pin

Claims (6)

Between a suspension ring, a pair of shafts whose lengths can be adjusted, a pair of cams rotatably supported at both ends of the shaft, a suspension ring bolt provided at the lower end of the suspension ring, and one end of the cam An actuator having a pair of cam links connected to each other, a support plate having an upper long groove and a lower long groove extending in a substantially vertical direction, and connected between the support plate and both ends of the shaft. A support having a pair of first slide links, and a pair of second slide links connected between a predetermined portion of each of the first slide links and a slide bolt movable in a lower long groove of the support plate And a suspension ring bolt in the working body is movable in an upper long groove of a support plate in the support body. 2. The suspension in concrete according to claim 1, wherein a pair of the operating body and the support body are provided at a predetermined interval, and connecting means for holding the operating body and the support body at the predetermined interval and interlocking with each other is provided. For clamps. 2. The concrete internal suspension according to claim 1, wherein cams are rotatably supported at both ends of the shaft via cam bolts, and one ends of the first slide links are connected to the cam bolts. Clamp. Each of the shafts has a pair of first shafts that rotatably support a cam at an outer end thereof, a second shaft that accommodates an inner end portion of each of the first shafts, and the second shaft with respect to the second shaft. The clamp for hanging in concrete according to any one of claims 1 to 3, further comprising an adjusting means for adjusting an accommodation length of an inner end portion of one shaft. A first shaft that rotatably supports one cam at one end thereof; a second shaft that accommodates the other end of the first shaft and rotatably supports the other cam at the other end; 4. The clamp for hanging concrete in any one of claims 1 to 3, further comprising an adjusting means for adjusting an accommodation length of the first shaft with respect to the second shaft. The adjusting means includes at least one pin insertion hole provided in one of the first shaft and the second shaft, a plurality of pin adjustment holes provided in the other of the first shaft and the second shaft, a pin insertion hole, and 6. The clamp for hanging in concrete according to claim 4 or 5, comprising a pin that can be inserted / removed to connect and integrate the first shaft and the first shaft through one selected pin adjustment hole. .

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