JP2004108415A - Two-ream clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-ream clamp formed in a small size, using a less number of component parts, and mountable quickly with an easy hand operation. <P>SOLUTION: The two-ream clamp is structured so that a first 1 and a second ring member 2 are laid in line in the radial direction, and each ring member 1/2 is furnished with first fastening pieces 1b and 1c and second fastening pieces 2b and 2c, respectively, confronting in the circumferential direction at the open ends of the C-form bodies 1a and 2a. The second fastening pieces 1b and 1c of the first ring member 1 are overlapped on the second and first fastening pieces 2c, 2b of the second ring member 12, and a fastening force is given in the direction in which the bodies 1a and 2a are contracted diametrically by a bolt 3 and a nut 8 inserted into the fastening pieces 1b, 1c, 2b, 2c. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dual clamp for connecting a second member such as a pipe or a hose to a pair of cylindrical first members arranged side by side.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a clamp shown in FIG. 6 has been known as a clamp for fitting a second member such as a tube or a hose into a pair of cylindrical first members such as a duct and fixing it from the outside. This clamp uses two ring members 30 each having a pair of tightening pieces 32 circumferentially opposed to the open end of a C-shaped main body 31. Each of the ring members 30 is connected to the first member and the second member. The elongated bolts 34 are fitted to the outer peripheral surfaces of the overlapped connecting portions, and with the collar 33 made of a hollow shaft interposed between the opposed tightening pieces 32 of the two ring members 30, One of the ring members 30 (left side in the figure) is inserted into the insertion holes 38 and the collars 33 of all the fastening pieces 32 from the side of the ring member 30 and screwed into the welding nut 37 of the other (right side in the figure) ring member 30 to be tightened. It has become.
[0003]
Each body 31 of the two ring members 30 is tightened on the outer peripheral surface of the connecting portion while being reduced in diameter by receiving the fastening force of the bolt 34, and holds both members in a connected state. When the bolt 34 is tightened, the collar 33 holds the two ring members 30 at a constant interval.
[0004]
[Problems to be solved by the invention]
However, the clamp requires a pair of ring members 30, a collar 33, and a bolt 34, and has a relatively large number of parts of four. In addition, since the long collar 33 and the long bolt 34 are required, the overall size is increased. Further, when assembling the clamp, it is necessary to insert the bolt 34 into the insertion hole 38 of one ring member 30, insert the bolt 34 into the long collar 33, and further insert the bolt 34 into the insertion hole 38 of the other ring member 30. The work is troublesome.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a dual clamp that is small in size, has a small number of parts, and can be quickly mounted by an easy manual operation.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the dual clamp according to the present invention, the first and second ring members are arranged in a radial direction, and each of the ring members is circumferentially attached to an open end of a C-shaped main body. Having opposing first and second fastening pieces, wherein the first and second fastening pieces of the first ring member are superimposed on the second and first fastening pieces of the second ring member, respectively; Bolts and nuts inserted through all the fastening pieces apply a fastening force in the direction in which the body is reduced in diameter.
[0007]
In this double clamp, it is possible to previously weld a nut to one of the first and second ring members that can be formed in the same shape as in the conventional case. The number of components and bolts can be reduced to three. In addition, since the pair of ring members overlap the first and second tightening pieces and insert the bolts into the respective tightening pieces and screw the nuts into the nuts, a long collar and a bolt like the conventional clamp are not required. Therefore, the double clamp becomes compact. Moreover, since the two ring members are connected by bolts and nuts in the space sandwiched between these bodies, there is no member that projects in the front-rear direction orthogonal to the juxtaposition direction of the two ring members. Also in this respect, there is an advantage that the overall shape is reduced in size and can be installed in a small mounting space. Further, since the conventional collar is not required and only a relatively short bolt needs to be inserted through the fastening pieces of the two ring members, the clamp assembling operation is facilitated.
[0008]
In a preferred embodiment of the present invention, a second tightening piece of the second ring member is superimposed on the inner side of the first tightening piece of the first ring member in a circumferential direction, and a circumference of the second tightening piece of the first ring member is overlapped. The first fastening piece of the second ring member is superposed outward in the direction, and the nut is fixed to the circumferential outer surface of the first fastening piece of the second ring member. According to this configuration, since the pair of tightening pieces of each of the first and second ring members are alternately overlapped, both ring members can be formed in the same shape and size. Therefore, by using two single type ring members and fixing the nut to the second ring member, both ring members can be obtained, so that productivity is high.
[0009]
In another preferred embodiment of the present invention, the main body of each of the ring members is brought into contact with the vicinity of the second tightening piece on the inner circumferential surface of the main body and the vicinity of the first tightening piece on the inner circumferential surface of the main body to hold the main body. The shaping guide piece is fixed. According to this configuration, the ring member is reduced in diameter while the main body is deformed along the guide piece by tightening the bolt, so that distortion is prevented from occurring near the opening of the C-shaped main body. Is done.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1A and 1B are a front view and a bottom view of a clamped state showing a double clamp according to an embodiment of the present invention. This double clamp is composed of three members: first and second ring members 1 and 2 arranged in the radial direction, and a bolt 3 for applying a fastening force to reduce the diameter of the two ring members 1 and 2. That is, the number of parts is reduced by one as compared with the conventional clamp (FIG. 6).
[0011]
The two ring members 1 and 2 have C-shaped main bodies 1a and 2a, and first and second tightening pieces 1b and 1c protruding from both ends of the openings of the main bodies 1a and 2a and facing the circumferential direction of the main bodies 1a and 2a. , 2b and 2c, and have the same shape and the same dimensions. That is, as shown in FIG. 2 which is a developed view of the two ring members 1, 2, a metal strip such as spring steel having insertion holes 4, 7 formed at both ends in the longitudinal direction is formed by a circle. It can be formed simply by bending to bend into a shape and bending the front sides of the insertion holes 4 and 7 at both ends to provide the first and second fastening pieces 1b, 1c, 2b and 2c. In addition, one end part (right end part in the figure) which becomes the first fastening pieces 1b and 2b has a wide shape. The second ring member 2 of the pair of ring members 1 and 2 having the same shape and the same size is arranged on the outer circumferential surface of the first fastening piece 2b so as to match the insertion hole 4 as shown in FIG. The nut 8 in (b) is welded.
[0012]
FIG. 3 is a plan view showing the first and second ring members 1 and 2 before use. The first and second ring members 1 and 2 are formed such that the second tightening piece 2c of the second ring member 2 is superimposed on the inner side of the first tightening piece 1b of the first ring member 1 in the circumferential direction. The first tightening pieces 2b of the second ring member 2 are superposed on each other in a circumferentially outer side of the second tightening pieces 1c of the ring member 1 and are combined with each other. That is, the fastening pieces 1b, 1c, 2b, 2c of the first and second ring members 1, 2 are alternately superposed. Therefore, the first and second ring members 1 and 2 can be smoothly connected while having the same shape and the same dimensions.
[0013]
In the vicinity of the second fastening pieces 1c, 2c on the inner peripheral surfaces of the main bodies 1a, 2a of the ring members 1, 2, the vicinity of the first fastening pieces 1b, 2b on the inner peripheral surfaces of the main bodies 1a, 2a during clamping. Guide pieces 9 and 10 that contact and hold the main bodies 1a and 2b are fixed by welding at the welded portions 11 and 12. With respect to the openings 23 and 24 in the main bodies 1a and 1b, both side portions are bulged outward by the thickness of the guide pieces 9 and 10 to form enlarged diameter portions 27 and 28. Inner diameter sides of 27 and 28 are escapes of the guide pieces 9 and 10. Therefore, the inner peripheral surfaces of the main bodies 1a and 2a including the guide pieces 9 and 10 have a substantially accurate circular shape in the state of FIG.
[0014]
Before use, the first fastening piece 1b of the first ring member 1 and the second fastening piece 2c of the second ring member 2 are positioned and overlapped in a relative arrangement where the respective through holes 4, 7 match, As shown in FIG. 3, the second fastening piece 1c of the first ring member 1 and the first fastening piece 2b of the second ring member 2 are positioned in a relative arrangement where the respective insertion holes 7, 4 match. Polymerized.
[0015]
Next, a procedure for performing a clamping operation by the double clamp will be described. As shown in FIG. 3, the fastening pieces 1 b, 2 c, 1 c, 2 b of both ring members 1, 2 are overlapped with each other, and the bolt 3 is inserted through the insertion holes 4, 7 and loosely screwed into the nut 8. In this state, the first and second ring members 1 and 2 are still expanded. The first and second ring members 1 and 2 are temporarily fixed to one of the first and second members to be connected, for example, a rubber outlet duct 21 in the air cleaner 17 of the engine intake chamber shown in FIG. Keep it.
[0016]
Next, the tube 22, which is the second member, is fitted inside the outlet duct 21, and the bolt 3 of the double clamp is strongly screwed. Thereby, the main bodies 1a and 2a of the ring members 1 and 2 in FIG. 3 are reduced in diameter and grip the tube 22 in close contact with the outlet duct 21 in FIG. The air cleaner 17 purifies the air A entering from the inlet 18 by the built-in cleaner element 19, and then flows from the outlet duct 21 through the tube 22 to the throttle body (not shown) as a fuel supply device. As shown in FIG. 5, four outlet ducts 21 of the cleaner case 17 are provided. Therefore, the outlet duct 21 and the tube 22 are connected by two double clamps.
[0017]
As described above, the double clamp has a small number of parts, does not require a long collar and a long bolt as in the related art, and can use a relatively short bolt 3 shown in FIG. Becomes smaller.
[0018]
Further, when the fastening force of the bolt 3 is applied, the ring members 1, 2 are reduced in diameter while the main bodies 1a, 2a are deformed along the guide pieces 9, 10, so that the C-shaped main bodies 1a, 2a are reduced. Distortion can be prevented from being generated in the vicinity of the openings 23 and 24, and the outlet duct 21 and the tube 22 can be firmly gripped. Moreover, the guide pieces 9 and 10 also function to reinforce the vicinity of the openings 23 and 24 in the main bodies 1a and 2a. Further, the conventional long collar is not required, and only the relatively short bolt 3 needs to be inserted through the tightening pieces 1b, 1c, 2b, 2c of the two ring members 1, 2, so that the clamp assembling operation is facilitated. .
[0019]
In the double clamp, the first and second tightening pieces 1b, 1c, 2b, 2c of the pair of ring members 1, 2 are superimposed, and a bolt 3 is attached to each of the tightening pieces 1b, 1c, 2b, 2c. Since it is inserted and screwed into the nut 8, as is apparent from a comparison between FIG. 1B and FIG. 6, the two ring members 1 and 2 in FIG. 1B are sandwiched between these main bodies 1a and 2a. There is no member connected by the bolt 3 and the nut 8 in the space formed and protruding in the front-rear direction orthogonal to the direction in which the two ring members 1 and 2 are juxtaposed. Also in this respect, there is an advantage that the overall shape is reduced in size and can be installed in a small mounting space.
[0020]
In the above-described embodiment, the case where the outlet duct 21 and the tube 22 in the motorcycle cleaner case 17 are connected by the double clamp of the present invention is exemplified. However, the double clamp of the present invention is used for the above-described application. The present invention is not limited to this, and can be widely used for a structure for connecting a cylindrical first member and a second member.
[0021]
【The invention's effect】
As described above, according to the dual clamp of the present invention, the number of parts can be reduced, and a long bolt and a collar are not required, and the size is reduced. Also, since the two ring members are connected by bolts and nuts in the space between these bodies, there is no member that projects in the front-rear direction orthogonal to the juxtaposition direction of the two ring members, and from this surface, The overall shape is small and can be installed in a small mounting space. Furthermore, since the pair of ring members are tightened using relatively short bolts on the respective fastening pieces overlapping each other without interposing a long collar such as a conventional clamp, the connecting operation can be performed easily and quickly. .
[Brief description of the drawings]
FIGS. 1A and 1B are a front view and a bottom view of a clamped state showing a double clamp according to an embodiment of the present invention.
FIG. 2 is a development view of a ring member in the double clamp according to the first embodiment.
FIG. 3 is a plan view showing both ring members 1 and 2 before use.
FIG. 4 is a partially broken side view showing a motorcycle cleaner case using the double clamp of the above.
FIG. 5 is a bottom view showing the same cleaner case.
FIG. 6 is a plan view showing a conventional clamp.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... 1st ring member 1a ... 1st ring member main body 1b, 1c ... 1st ring member 1st and 2nd fastening piece 2 ... 2nd ring member 2a ... 2nd ring member main body 2b. .., 2c... First and second tightening pieces 3 of the second ring member 3... Bolts 8.

Claims (3)

First and second ring members are arranged radially;
Each of the ring members has first and second fastening pieces circumferentially opposed to an open end of a C-shaped main body,
The first and second tightening pieces of the first ring member are superimposed on the second and first tightening pieces of the second ring member respectively, and the main body is formed by bolts and nuts inserted through all the tightening pieces. A double clamp in which a fastening force is applied in the direction in which the diameter is reduced. 2. The first ring member according to claim 1, wherein a second tightening piece of the second ring member is superposed on a circumferentially inner side of the first tightening piece of the first ring member, and a circumferentially outer side of the second tightening piece of the first ring member. A double clamp in which a first fastening piece of the second ring member is superimposed, and the nut is fixed to a circumferential outer surface of the first fastening piece of the second ring member. The guide according to claim 1 or 2, wherein the ring member keeps the shape of the body by contacting the vicinity of the second fastening piece on the inner peripheral surface of the main body of the ring member and the vicinity of the first fastening piece on the inner peripheral surface of the main body of the ring member. A double clamp with a fixed piece.

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