JP3743068B2 - Pipe clamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe fixing clamp for fixing a pipe to another member, and is effective for use in fixing a pipe (pipe) of a vehicle air conditioner.
[0002]
[Prior art]
Conventionally, as shown in FIG. 8, the pipe fixing clamp 1 is made of a metal holding clamp portion 12 for preventing electric contact between different metals and a metal that sandwiches the holding clamp portion 12 so as to wrap the holding clamp portion 12 from the outside. The clamp main body part 11 is comprised. And the latching | locking parts 16 and 17 which maintain the state which pinched | interposed the pipe 2 and the holding | maintenance clamp part 12 are formed in the edge part of the clamp main-body part 11 when the clamp main-body part 11 elastically deforms.
[0003]
[Problems to be solved by the invention]
By the way, in order to secure the locking force of the locking parts 16 and 17, the amount of deformation of the clamp body 11 when the clamp body 11 is locked is inevitably increased. For this reason, when the clamp body 11 is locked, as shown in FIG. 9, the pipe 2 is pressed to the extent that the clamp body 11 plastically deforms a part d of the pipe, and the pipe 2 is deformed. There was a risk of letting it go.
[0004]
Further, in order to lock the clamp body 11 while maintaining a sufficient locking force with the locking portions 16 and 17, a force sufficient to deform the pipe 2 as described above is required. Since a dedicated jig for locking the portion 11 is required, improvement of the assembly of the pipe fixing clamp 1 to the pipe 2 has been hindered.
An object of this invention is to prevent the deformation | transformation of the pipe at the time of latching, maintaining sufficient latching force in the latching | locking part of a clamp main-body part in view of the said point.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a pipe fixing clamp (1) for sandwiching a pipe (2) and fixing the sandwiched pipe (2) to another member. The holding clamp portion (12) to be held, the clamp main body portion (11) that sandwiches the holding clamp portion (12) so as to wrap from the outside, and the clamp main body portion (11) are formed, and the clamp main body portion (11) is elastic. By being deformed, the pipe (2) and the holding clamp part (12) are held and the latching parts (16, 17) are maintained, and the holding clamp (12) contacts the pipe (2). And a holding projection (18) for holding the pipe (2), and is a portion corresponding to the holding projection (18) in the clamp body (11), and is a locking portion (16, 17). ) Clamp book When the portion (11) is locked, the rigidity of the clamp body portion (11) is reduced to a portion where the force acting on the pipe (2) is increased from the clamp body portion (11). 11) A deformation promoting portion (20) that promotes deformation is formed.
[0006]
As a result, when the clamp body (11) is locked, the clamp body (11) is easily bent as will be described later, so that an excessive force acts on the pipe (2) from the clamp body (11). Is prevented. Therefore, the deformation of the pipe (2) when the clamp body (11) is locked can be prevented.
Moreover, since the deformation | transformation promotion part (20) is formed in the site | part where the force which acts on a pipe (2) from a clamp main-body part (11) increases most when latching a clamp main-body part (11), The deformation of the pipe (2) can be prevented without lowering the rigidity of the clamp body (11) more than necessary.
[0007]
Furthermore, as described above, the clamp main body (11) is easily bent, so that the locking portions (16, 17) can be locked without using a dedicated jig. As a result, the assembly of the pipe fixing clamp (1) to the pipe (2) is improved .
[0008]
Further, according to the present invention, the deformation promoting portion (20) protrudes toward the pipe (2) and the notch portion (21) that reduces the cross-sectional area of the clamp main body portion (11) to reduce the rigidity of the clamp main body portion 11. A protrusion (22) that protrudes toward the pipe (2), thereby providing a gap (24) between the clamp body (11) and the holding clamp part (12). Is generated to secure a bending margin of the clamp body portion (11) when the clamp body portion (11) is locked, and the clamp body portion (11) is formed between the projection portion (22) and the clamp body portion (11). It is characterized in that an excessive force is prevented from acting on the holding projection (18) by bending around the binding site . Thus, the protruding dimension of the protruding portion (22), so as the deflection allowance of the clamp body portion when the locking clamp body portion (11) (11) Ru can be secured, the clamp body portion (11) It is possible to prevent force from acting on the pipe (2). Therefore, deformation of the pipe (2) can be prevented more reliably.
[0009]
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described.
(Embodiment)
FIG. 1 shows a state in which a pipe fixing clamp (hereinafter abbreviated as a clamp) 1 according to this embodiment is applied to a brass pipe (piping) 2 for supplying hot water to a heater core for vehicle heating. The clamp 1 holds the pipe 2 so as to be sandwiched from the outer wall side of the pipe 2. And in the state which pinched | interposed the pipe 2, it fixes to the chassis of a vehicle by fastening means, such as a volt | bolt.
[0011]
FIG. 2 is a front view of the clamp 1 showing a state before the pipe 2 is sandwiched. The clamp 1 is a clamp body made of metal (cold rolled steel plate in the present embodiment) that sandwiches the pipe 2 from the outer wall side of the pipe. and parts 11, made of resin for preventing electrolytic corrosion caused by the dissimilar metals are in contact (in this embodiment, polypropylene) and a retaining clamp portion 12. of.
[0012]
In addition, the a part of the clamp main body part 11 and the b part of the holding clamp part 12 reduce the thickness of the holding clamp 12 and make it easier to bend the clamp parts 11 and 12 as will be described later. As shown, a notch 13 is formed in the clamp body 11 to reduce the rigidity of the a and b portions. Further, as shown in FIGS. 2 to 4, the holding clamp portion 12 is integrally formed with a locking projection portion 14 that prevents the holding clamp portion 12 from shifting with respect to the clamp main body portion 11. Is formed with a locking groove 15 into which the locking projection 14 is inserted.
[0013]
And the latching | locking parts 16 and 17 for maintaining the state which clamped the pipe 2 (refer FIG. 5) are formed in the both ends of the clamp main-body part 11, respectively. As shown in FIG. 2, these locking portions 16 and 17 are substantially hooked with each other, and the clamp body 11 on the locking portion 17 side is bent toward the locking portion 16 with the a portion as a center. At this time, the clamp main body 11 is elastically deformed to lock both the locking portions 16 and 17.
[0014]
Reference numerals 18 and 19 denote holding projections for contacting the pipe 2 to hold the pipe 2, and the holding projections 18 and 19 are integrally formed with the holding clamp 12. Then, the portion corresponding to the holding projections 18 of the clamp body 11, as shown in FIG. 3, the deformation promoting portion 20 that promotes deformation of the clamp body 11 is formed. The deformation promoting portion 20 is configured by a notch portion 21 that reduces the cross-sectional area of the clamp main body portion 11 to reduce the rigidity of the clamp main body portion 11.
[0015]
As shown in FIG. 2, the deformation promoting portion 20 is formed with a protruding portion 22 that protrudes toward the pipe 2 in addition to the notched portion 21, and the protruding portion 22 and the notched portion 21 are formed of the clamp body portion 11. pressing the formed simultaneously. Reference numeral 23 denotes a fixing bolt hole when the clamp 1 is assembled to the chassis. Next, the assembly method and characteristics of the clamp 1 according to the present embodiment will be described.
[0016]
First, the holding clamp 12 is assembled to the clamp body 11. Next, the pipe 2 is fitted into the holding clamp 12 (see FIG. 2). Then, as shown in FIG. 6, the clamp body 11 on the locking part 16 side is bent to the locking part 17 side around the a part, and the clamp body 11 on the locking part 16 side is bent on the pipe 2 side (see FIG. 6). The locking portions 16 and 17 are completely locked so as to be pushed down (below 6).
[0017]
At this time, the clamp body 11 is, as shown in FIG. 7 (D part enlarged view of FIG. 6), by flexing about the binding sites of the projecting portion 22 and the clamp main body 11 (deformation), retention excessive force projections 1 8 is prevented from acting. Therefore, since an excessive force is prevented from acting on the pipe 2, it is possible to prevent the pipe 2 from being deformed. In FIG. 7, the solid line indicates a bent state, and the alternate long and short dash line indicates a state where the locking operation has been completed.
[0018]
Further, the notch 21 is a portion corresponding to the holding projection 18 in the clamp main body 11, that is, a portion where the force acting on the pipe 2 from the clamp main body 11 increases most when the clamp main body 11 is locked. Therefore, the deformation of the pipe 2 can be prevented without lowering the rigidity of the clamp body 11 more than necessary.
[0019]
Further, since the protruding portion 22 protrudes toward the pipe 2, a gap 24 is generated between the clamp main body portion 11 and the holding clamp portion 12 as shown in FIG. Therefore, since Ru can be ensured white flexure of the clamp body portion 11 when locking the clamp body 11, to prevent the force acts on the holding from the clamp body 11 the clamp 12 (pipe 2) be able to. Therefore, deformation of the pipe 2 can be prevented more reliably.
[0020]
Moreover, since the notch part 21 is shape | molded simultaneously with the press work of the clamp main-body part 11, as a means to accelerate | stimulate the deformation | transformation of the deformation | transformation promotion part 20, the groove | channel etc. which make thickness thin in the deformation | transformation promotion part 20 are provided, for example. Compared with means, it can be formed easily. Therefore, an increase in the manufacturing cost of the clamp 1 can be suppressed and deformation of the pipe 2 can be prevented.
[0021]
Furthermore, as described above, the clamp main body 11 is easily bent, so that the locking portions 16 and 17 can be locked without using a dedicated jig. As a result, the assembling property of the clamp 1 to the pipe 2 is improved.
By the way, in the above-mentioned embodiment, although the rigidity of the clamp main-body part 11 was reduced by forming the notch part 21 in the deformation | transformation promotion part 20, by reducing the thickness of the deformation-promotion part 20, the clamp main-body part 11 of FIG. The present invention can be implemented even if the rigidity is lowered.
[0022]
Further, in the above-described embodiment, the clamp 1 that fixes the two pipes 2 has been described as an example. However, the present invention is not limited to the clamp 1 that fixes the two pipes 2, but one or three. It is applicable also to the clamp which fixes the pipe 2 more than this.
In the above-described embodiment, since the pipe 2 and the clamp main body 11 are made of different metals, the resin holding clamp 12 is disposed to prevent electrical contact. For example, in the case of a resin pipe or the like, the holding clamp 12 may be eliminated.
[Brief description of the drawings]
[1] Ru schematic view showing a state of applying a brass pipe for the pipe fixing clamps to supply hot water to the heater core for a vehicle heating.
FIG. 2 is a front view of a pipe fixing clamp showing a state before the pipe is sandwiched.
FIG. 3 is a view on arrow A in FIG. 2;
4 is a view taken in the direction of arrow B in FIG. 2;
FIG. 5 is a front view of a pipe fixing clamp showing a state where a pipe is sandwiched.
FIG. 6 is a front view of a pipe fixing clamp showing a state in the middle of sandwiching the pipe.
7 is an enlarged view of a portion D in FIG. 6;
FIG. 8 is a front view of a conventional pipe fixing clamp showing a state in which a pipe is sandwiched.
FIG. 9 is a front view of a conventional pipe fixing clamp showing a state in which the pipe is being sandwiched.
[Explanation of symbols]
1 ... Clamp for fixing pipe, 2 ... Pipe,
11 ... Clamp body part, 12 ... Holding clamp part,
16, 17 ... Locking part, 20 ... Deformation promoting part, 21 ... Notch part, 22 ... Projection part.

Claims (1)

A pipe fixing clamp (1) for sandwiching a pipe (2) and fixing the sandwiched pipe (2) to another member,
A holding clamp (12) for holding the pipe (2) ;
A clamp body (11) for sandwiching the holding clamp (12) from outside ,
A locking portion (16) that is formed on the clamp body (11) and maintains the state where the pipe (2) and the holding clamp portion (12) are sandwiched by elastic deformation of the clamp body (11). 17)
The holding clamp (12) has a holding projection (18) for contacting the pipe (2) and holding the pipe (2),
Of the clamp body portion (11), the portion corresponding to the holding protrusion (18), and when the clamp body portion (11) is locked by the locking portions (16, 17), In a portion where the force acting on the pipe (2) is increased from the main body portion (11), a deformation promoting portion that reduces the rigidity of the clamp main body portion (11) and promotes deformation of the clamp main body portion (11). (20) is formed ,
The deformation promoting part (20) includes a notch part (21) for reducing the cross-sectional area of the clamp body part (11) to reduce the rigidity of the clamp body part 11, and a protrusion part protruding toward the pipe (2) side. (22), and the protrusion (22) protrudes toward the pipe (2), whereby a gap (24) is provided between the clamp body (11) and the holding clamp (12). ) Is generated to secure a bending margin of the clamp main body portion (11) when the clamp main body portion (11) is locked, and the clamp main body portion (11) is connected to the protrusion (22) and the clamp main body portion. A pipe-fixing clamp characterized in that an excessive force is prevented from acting on the holding projection (18) by bending about a coupling site with (11) .

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