JP2814060B2 - Temporary steel pipe clamp device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe clamping apparatus for temporary use in civil engineering construction sites and the like, and more particularly to a clamp apparatus for clamping two steel pipes crossing at an arbitrary angle at an intersection. is there.

[0002]

2. Description of the Related Art For example, at a construction site, a large number of support units 2 for supporting a slab concrete formwork 1 are provided as shown in FIG. The pillar units 2 can be connected and integrated with each other by the inclined steel pipes 3 to prevent accidental lodging and enhance safety. For this reason, the slanted steel pipes 3 and the pillar units 2 are connected to each other. At the intersection A with the lower large-diameter steel pipe 2a and at the intersection B with the upper small-diameter steel pipe 2b, a clamp device for clamping both is required.

[0003] Thus, the oblique steel pipe 3 and the column unit 2
Conventionally, both steel pipes are clamped using a free pipe clamp formed by connecting two pipe clamps to each other so as to be rotatable relative to each other, or both steel pipes are connected using a line. Intersections were fastened to each other. However, the universal pipe clamp has a drawback that it takes a lot of time and labor because the clamp nut of the pipe clamp must be fastened for each steel pipe. There was a problem with reliability.

Therefore, a clamping device has been considered which clamps the intersection of two steel pipes from the outside. However, even if the frictional resistance between the steel pipe and the pressing part or the receiving part for clamping on the outside of each steel pipe is relatively large. The two steel pipes are in a state where they are in point contact with each other, and the frictional resistance between the two steel pipes is very small. Therefore, when an external force acts on one of the steel pipes in such a manner as to change the crossing angle with the other steel pipe, the clamping device clamps the steel pipes at an arbitrary crossing angle. The steel pipe moved relatively easily in the direction of action of the external force. Such movement of one of the steel pipes is extremely dangerous because it results in weakening of the clamping force of the clamping device or deviation from the other steel pipe. The present invention has been made to solve such a conventional problem.

[0005]

The structural features of the present invention for achieving the above object are indicated by reference numerals in the embodiments described later, and include a main body (11), a clamping means (12), , An intermediate non-slip means (13), and the main body (11) includes two steel pipes formed of a pair of front and rear frame portions (14, 15) and a pair of left and right frame portions (16, 17). It is a rectangular frame that can surround the intersection, and the clamping means (12) is
(14, 15) is screwed through and has a steel pipe pressing portion (24) at the inner end.
And a steel pipe receiving portion (26) provided inside the other side of the front and rear frame portions (14, 15). A support (31) supported on one of the frame portions (16, 17) so as to be movable in its length direction.
Is clamped between the steel pipe pressing part (24) of the clamping means (12) and the steel pipe receiving part (26) and is clamped between the intersections of two steel pipes. The main body (11) is characterized in that at least the left and right frame portions (17) of the main body (11) on the side that does not support the intermediate anti-slip means (13) can be opened and closed.

In carrying out the present invention, the main body (1
The left and right frame portions (1) on the side supporting the intermediate anti-slip means (13) of (1)
6), the front and rear frame portions (14, 15) of the main body (11) and the support (31) of the intermediate non-slip means (13) are made non-rotatable, so that the steel pipe pressing portion of the clamp means (12) (24), the steel tube receiving portion (26), and the clamped body (32) of the intermediate non-slip means (13) can be configured to always be aligned on the same straight line.

[0007] In addition, the clamped member (3) of the intermediate non-slip means (13).
2) can be composed of two disc springs (35, 36) attached to both sides of the support (31) back to back, and the two disc springs (35, 36) are substantially A square one,
Place the bottom of each disc spring (35, 36) on both sides of the support (31) on a common support shaft.
By (37), it is rotatably supported, and each side (35a, 36a) of each disc spring (35, 36) can be recessed in an arc shape so that the peripheral surface of the round steel pipe can be fitted.

Further, the steel pipe pressing portion (2) of the clamping means (12)
4) and the steel pipe receiving portion (26) are constituted by disc springs (27, 28), each disc spring (27, 28) is formed in a substantially rectangular shape, and the bottom thereof is a clamping screw shaft (25) and front and rear frames. The portion (14) is rotatably supported by the shaft, and each side (27a, 28a) of the disc spring can be recessed in an arc shape so that the peripheral surface of the round steel pipe can be fitted.

Further, the support (31) of the intermediate non-slip means (13)
Is composed of two elastic plates (33, 34) which overlap each other at one end and open at the other end in a substantially U-shape, and the other ends of the two elastic plates (33, 34) When the elastic plates (33, 34) approach each other against the elasticity, one of the left and right frame portions (14, 15) of the main body (11) has a hole (33a) through which it can move in the length direction. , 34a) can be provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 shows a clamping device 10 according to an embodiment of the present invention, in which a lower large-diameter steel pipe 2a in a column unit 2 of FIG. This shows a state used at the intersection A with the oblique steel pipe 3, and the clamping device 10 includes a main body 11, clamping means 12, and intermediate non-slip means 13.

The main body 11 includes a pair of front and rear frame portions 14 and 15.
And a pair of left and right frame portions 16 and 17 and a rectangular frame shape that can surround the intersection of the two steel pipes 2a and 3 and each of the frame portions 14 to 17 is an independent member. As shown in FIGS. 3 to 5, one of the front and rear frame portions 14 is formed by pressing a pressed member having a U-shaped cross section and a center portion in the length direction bent outwardly. 14
a is used to open outward, and the other front and rear frame portion 15 is formed by pressing a pressed member having a U-shaped cross section and a central portion in a longitudinal direction bent outward in a U-shaped cross section. 15a is used to open inward. Further, one of the left and right frame portions 16 is formed of a bar having a hexagonal cross section, and the other left and right frame portion 17 is formed of a rod having a circular cross section.

The left and right frame portions 16 each having a hexagonal rod-like cross section are provided with a small-diameter screw shaft portion 16a formed at one end.
Is passed through one end of one of the front and rear frame portions 14, and the nut 18 screwed to the screw shaft portion 16a in the groove portion 14a of the front and rear frame portion 14 is prevented from rotating in a direction perpendicular to the front and rear frame portion 14. It is stuck to. Of course,
The two may be simply joined by welding. The other front and rear frame portion 15 is fitted into the left and right frame portion 16 in a hexagonal through hole 19 provided at one end thereof so as to be movable only in the length direction,
The large diameter head 16b formed at the free ends of the left and right frame portions 16 prevents the left and right frames 16 from coming off.

The other left and right frame portion 17 formed of a rod-shaped body having a circular cross section has a bearing portion 17a formed at one end.
A support shaft 20 is provided in the groove 14a at the other end of one of the front and rear frame portions 14.
And a large-diameter head 17b is provided at the other end. The other end of the other front and rear frame portion 15 has a large-diameter head 1 wider than the diameter of the left and right frame portions 17.
A notch engaging portion 21 having a width smaller than that of the notch engaging portion 21 is formed, and a detachable rising portion 22 of the large-diameter head 17b is continuously provided upward from both ends of the notching engaging portion 21.

The clamping means 12 has a groove 1 inside the central projection 15b of one of the front and rear frame portions 15 of the main body 11.
A screw shaft 25 for clamping, which is screwed through a nut 23 fixed inside 5a, has a steel pipe pressing portion 24 at the inner end, and has a rotating handle 25a connected to the outer end, and the other front and rear frame portion 14 And a steel pipe receiving portion 26 provided inside the inside. The steel pipe pressing portion 24 is a square disc spring 2
7 and the bottom of this disc spring 27 is
5 is rotatably attached to the tip shaft portion. The steel pipe receiving portion 26 is also formed of a square disc spring 28, and this disc spring 2
8 is rotatably attached to a tip shaft of a bolt 30 fixed to a central projection 14 b of the front and rear frame portion 14 with a nut 29. These disc springs 27, 28
28a is recessed in an arc shape so that the peripheral surface of the round steel pipe can be fitted.

The intermediate non-slip means 13 is composed of a support 31 supported by one of the left and right frame portions 16 formed of a bar having a hexagonal cross section of the main body 11 and a clamped body 32 mounted on the support 31. It is configured. Thus, the support 31
Is composed of two elastic plates 33 and 34 that overlap each other at one end and open at the other end in a substantially C-shape.
Are two disc springs 35, 36 attached back-to-back on both sides of one end overlapping portion of the two elastic plates 33, 34.
It is composed of As shown in FIGS. 6 and 7, these two disc springs 35 and 36 are composed of two elastic plates 33 and 34.
Are rotatably supported at the bottoms of the respective disc springs 35 and 36 by a common support shaft 37 penetrating the one end overlapping portion. These two disc springs 35, 36 are also rectangular, and each side 35a, 36a is recessed in an arc shape so that the peripheral surface of the round steel pipe can be fitted.

The two elastic plates 33 constituting the support 31,
When the two elastic plates 33 and 34 are moved closer to each other against elasticity, the right and left frame portions of the main body 11 formed of a hexagonal bar-shaped cross-section A hexagonal through hole 3 through which only the longitudinal direction 16 can pass.
3a and 34a are provided.

The clamping device 10 constructed as described above
The method of use will be described below. As shown in FIG. 3, one of the front and rear frame portions 15 is slightly moved along one of the left and right frame portions 16 so as to approach the other front and rear frame portion 14 side. Open the part 17 outward around the support shaft 20;
Further, the intermediate non-slip means 13 is moved along the left and right frame portions 16 in a direction away from the front and rear frame portions 14. In addition,
Even if the front and rear frame portions 15 and the intermediate non-slip means 13 are moved in this way, they cannot rotate around the front and rear frame portions 16, so that the steel pipe pressing portion 2 of the clamp means 12 can be rotated.
4, the steel pipe receiving portion 26, and the clamped body 32 of the intermediate non-slip means 13 are always aligned on the same straight line.

When the intermediate non-slip means 13 is moved along the left and right frame portions 16, as shown by phantom lines in FIG.
The free ends 33b, 34b of the two elastic plates 33, 34 constituting the support 31 are opened with a fingertip against the elasticity, and are sandwiched between the elastic plates 33, 34 by a fingertip. With the frictional resistance between the through holes 33a, 34a and the hexagonal column-shaped left and right frame portions 16 reduced, the free ends 33 of the elastic plates 33, 34 are reduced.
The support 31 may be slid in the desired direction as it is with the fingertips sandwiching b and 34b. By moving the fingertip away from the elastic plates 33 and 34 after the movement,
3 and 34 are elastically restored, and as shown in FIG.
3a, 34a and the peripheral surfaces of the left and right frame portions 16 are pressed against each other, so that the support 31 may move in any direction.
Since one of the through holes 33a and 34a of the third and the third 34 bites into the peripheral surfaces of the left and right frame portions 16 and acts without permission, the support 31 is completely fixed in position.

The clamp device 10 in the above state is
As shown in FIG. 3, for example, the vertical steel pipe 2 a (or 2 b) on the column unit 2 side is
The steel pipe 2a (or 2b) is externally fitted to the steel pipe 2a (or 2b) from the side so that the steel pipe 2a is located between the support member 6 and the clamped body 32 of the intermediate non-slip means 13. Next, the support 31 of the intermediate non-slip means 13 is moved along the left and right frame portions 16 in the manner described above, and the steel pipe 2a (or 2b) is held between the clamped body 32 and the steel pipe receiving portion 26. Let it be pinched. As a result, the clamping device 10
Is temporarily fixed to the steel pipe 2a (or 2b),
The clamp device 10 does not drop even if it is not supported by hand.

In this state, the other oblique steel pipe 3 is connected to the steel pipe pressing portion 24 of the clamping means 12 and the intermediate non-slip means 1.
3 and the closed left and right frame portions 17 are closed, and the free ends of the left and right frame portions 17 are fitted into the notch engaging portions 21 of the front and rear frame portions 15. In this state, the front and rear frame portions 15 are retracted to a position where they can be received by the large-diameter head portions 16b and 17b of the left and right frame portions 16 and 17, and the large-diameter head portions 17b of the left and right frame portions 17 are prevented from coming off. To be engaged inside. In this state, the clamping screw shaft 25 of the clamping means 12 is rotated in the screwing direction, and the steel pipe pressing portion 24 is moved forward to press the steel pipe 3 toward the clamped body 32 of the intermediate non-slip means 13.

As a result, the steel pipe 3 is pressed and clamped between the steel pipe pressing portion 24 of the clamp means 12 and the clamped body 32 of the intermediate non-slip means 13, and at the same time, the intermediate non-slip means 13 is pressed.
The clamped body 32 moves toward the steel pipe receiving portion 26 with the elastic deformation of the elastic plates 33 and 34 under the pressing force of the clamp means 12, so that the steel pipe 2a (or 2b) also has the intermediate non-slip. It is pressed and clamped between the clamped body 32 of the means 13 and the steel pipe receiving portion 26. That is, the two steel pipes 2a, 3 (or 2b, 3) are sandwiched between the steel pipe pressing portion 24 of the clamp means 12 and the steel pipe receiving section 26, and at the same time, the intermediate slip preventing means 13 interposed therebetween is clamped. The body 32 will be pinched.

Thus, the steel pipe pressing portion 24 and the steel pipe receiving portion 2
6 and the clamped body 32 of the intermediate non-slip means 13 are pressed against the peripheral surfaces of the steel pipes 2a (or 2b) and 3 at the disc springs 27, 28, 35 and 36 as described above, respectively. Each of these disc springs 27, 28, 35, and 36 rotates on its own axis to form two opposite sides 27a, 28a, and 35 of a concave arc shape.
a and 36a are fitted and pressed against the peripheral surfaces of the steel pipes 2a (or 2b) and 3 respectively. When the square steel pipe 38 is used as shown by the imaginary line in FIG. 2, the disc springs 27, 28, 35, 36 pressing the square steel pipe 38 press the flat side surfaces of the square steel pipe 38 at the four corners. Will do.

The interval between the left and right frame portions 16, 17 is
Even when the steel pipes having the maximum diameter (width) intersect at right angles to each other, it may be determined so that they can be used without any trouble. Further, the support 31 of the intermediate non-slip means 13 is simply provided by the left and right frame portions 1.
6 may be movable in its length direction. Of course, in this case, the clamp device cannot be temporarily fixed to one steel pipe. Further, the opening / closing structure of the left and right frame portions 17 is not limited to that of the above-described embodiment. For example, the left and right frame portions 14 and 15 may be completely detachable. Further, the configurations of the sandwiched portion 32 of the intermediate non-slip means 13 and the steel pipe pressing part 24 and the steel pipe receiving part 26 of the clamp means 12 are not limited to those of the above-described embodiment.

[0024]

The present invention can be embodied and used as described above. According to the apparatus of the present invention, the intersection of the two steel pipes is simply formed from outside by the steel pipe of the clamping means (12). Not only the pressing part (24) and the steel pipe receiving part (26) are sandwiched, but also the clamped body (32) of the intermediate non-slip means (13) between the two steel pipes.
Between the two steel pipes, the frictional resistance between the two steel pipes becomes very large as compared with the case where the two steel pipes are in direct contact with each other,
In the clamped state, even if an external force acts on one of the steel pipes so as to change the crossing angle between the steel pipes, the steel pipe does not easily move as in the conventional case, and the safety is greatly improved. .

Moreover, the openable and closable left and right frame portions of the main body (11) are provided.
(17) is released, and the clamped body (32) of the intermediate non-slip means (13)
The steel pipe is fitted into the steel pipe pressing portion (24) and the steel pipe receiving portion (26) of the clamp means (12) on both sides of the clamp means (12), and the clamping screw shaft (25) of one clamp means (12) is rotated. Since it is only necessary to perform the clamping operation, it is possible to easily and efficiently use the clamp work, which does not require much labor, as compared with a universal pipe clamp which requires a clamp operation for each steel pipe.

In particular, according to the configuration of the second aspect, the steel pipe pressing part (24) and the steel pipe receiving part (26) of the clamping means (12) and the clamped body (32) of the intermediate non-slip means (13). ) Are always aligned on the same straight line, which makes handling even easier,
Clamping work can be performed efficiently. According to the third and fourth aspects of the present invention, the frictional resistance between the two steel pipes to be clamped is further increased, and the two steel pipes are securely held at an intended intersection angle and clamped. be able to.

Further, according to the structure of claim 5,
Both steel pipes to be clamped and the steel pipe pressing part of the clamping means (12)
(24) and the frictional resistance with the steel pipe receiving portion (26) can be effectively increased, and the clamping effect can be enhanced. Further, according to the configuration of claim 6, between the clamped body (32) of the intermediate non-slip means 13 and the steel pipe receiving part (26) of the clamping means (12), the clamping device itself is provided for one steel pipe. Can be temporarily fixed, and the clamping operation can be performed more easily and efficiently. Moreover, no special operation is required to lock the support (31) of the intermediate non-slip means (13), and it can be composed of only two elastic plates (33, 34). The structure is simple and can be implemented at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic elevation view illustrating a use location of a clamp device.

FIG. 2 is a cross-sectional plan view showing a use state of the clamp device.

FIG. 3 is a partial cross-sectional plan view showing a detailed structure and a method of using the clamp device.

FIG. 4 is a cross-sectional view of the clamping means as viewed from the steel pipe receiving portion side.

FIG. 5 is a cross-sectional view of the clamping means as viewed from the steel pipe pressing portion side.

FIG. 6 is a sectional view of the intermediate anti-slip means.

FIG. 7 is a cross-sectional plan view of the intermediate non-slip means.

[Explanation of symbols]

 2a Steel pipe 2b Steel pipe 3 Steel pipe 10 Clamping device 11 Main body 12 Clamping means 13 Intermediate non-slip means 14 Front and rear frame part 15 Front and rear frame part 16 Hexagonal column-shaped left and right frame parts 17 Openable and closable cylindrical right and left frame parts 19 Hexagonal through hole DESCRIPTION OF SYMBOLS 20 Support shaft 21 Notch engaging part 24 Steel pipe pressing part of clamp means 25 Screw shaft for clamping 26 Steel pipe receiving part of clamp means 27 Disc spring 28 Disc spring 31 Support for intermediate non-slip means 32 Intermediate non-slip means to be clamped Body 33 Elastic plate 33a Hexagonal through hole 34 Elastic plate 34a Hexagonal through hole 35 Belleville spring 36 Belleville spring 37 Common support shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-13530 (JP, U) JP-A-3-101745 (JP, U) JP-A 53-7549 (JP, Y1) JP-A 37- 25919 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04G 7/16

Claims (6)

(57) [Claims] A main body (11), a clamping means (12) and an intermediate non-slip means (13), wherein the main body (11) comprises a pair of front and rear frame portions (14, 15) and a pair of left and right frames. (16, 17) and a rectangular frame which can surround the intersection of the two steel pipes, and the clamping means (12) is provided on the front and rear frame portions (14, 15) of the main body. A clamping screw shaft (25) having a steel pipe pressing portion (24) at its inner end, and a steel pipe receiving portion (26) provided inside the other of the front and rear frame portions (14, 15). The intermediate non-slip means (13) is supported on one of the left and right frame portions (16, 17) of the main body so as to be movable in its length direction (31).
Is clamped between the steel pipe pressing part (24) of the clamping means (12) and the steel pipe receiving part (26) and is clamped between the intersections of two steel pipes. A temporary steel pipe clamping device comprising a clamped body (32), wherein at least a left and right frame portion (17) of the main body (11) on a side that does not support the intermediate non-slip means (13) is configured to be openable and closable. 2. The front and rear frame portions of the main body (11) with respect to the left and right frame portions (16) on the side supporting the intermediate non-slip means (13) of the main body (11).
(14, 15) and the support (31) of the intermediate non-slip means (13) are not rotatable, and the steel pipe pressing part (24) and the steel pipe receiving part (26) of the clamping means (12), and the intermediate non-slip Means (13)
2. The temporary steel pipe clamping device according to claim 1, wherein 2) are always arranged on the same straight line. 3. The clamped body (32) of the intermediate non-slip means (13)
2 mounted back-to-back on both sides of the support (31)
3. The temporary steel pipe clamping device according to claim 1, comprising a plurality of disc springs (35, 36). 4. The two disc springs (35, 36) constituting the clamped body (32) of the intermediate non-slip means (13) are substantially square, and the bottom of each disc spring (35, 36) is Common support shaft (37) on both sides of support (31)
Each side of each disc spring (35, 36)
The temporary steel pipe clamping device according to claim 3, wherein the (35a, 36a) is concavely formed in an arc shape so that the peripheral surface of the round steel pipe can be fitted. 5. The steel pipe pressing part (24) and the steel pipe receiving part (26) of the clamping means (12) are constituted by disc springs (27, 28), and each disc spring (27, 28) is substantially rectangular. The bottom is rotatably supported by the clamping screw shaft (25) and the front and rear frame portion (14),
The temporary steel pipe clamping device according to any one of claims 1 to 4, wherein each side (27a, 28a) of the disc spring is recessed in an arc shape so that the peripheral surface of the round steel pipe can be fitted. 6. The support member (31) of the intermediate non-slip means (13) is composed of two elastic plates (33, 34) which overlap each other at one end and open at the other end in a substantially U-shape. Elastic plates (33,
When the two elastic plates (33, 34) approach each other against the elasticity on the other end of the main body (11), the left and right frame portions (1
4,15) through one of its holes (33
The temporary steel pipe clamping device according to claim 6, wherein a, 34a) is provided.