JP2016089880A - Piping clamp and connection structure of sanitary piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping clamp capable of easily performing a connecting work and a removing work of connecting ends of a flow passage constituting member and easily keeping a connecting force, and provide a connection structure of sanitary piping.SOLUTION: This invention comprises a supporting body 21 that can be opened or closed to support connecting ends 12 of a flow passage constituting member 11 to each other under their connected state; and a connector 30 for connecting between a pair of opening or closing ends 22 arranged at the supporting member 21. The connector 30 comprises an installing part 31 removably arranged between the opening or closing ends 22 and a fastening part 32 engaged in thread with the installing part 31, pressing the opening or closing ends 22 to fasten the supporting body 21. Further, the connector 30 comprises a rotary guide 33 arranged around the installing part 31 and held between the opening or closing ends 22 and the fastening part 32. The rotary guide 33 has a pair of relatively rotatable rotating pieces 37 for holding a rotary body 38. The flow passage constituting member 11 is joined by using a piping clamp 20 in which a rotational resisting force between a pair of rotating pieces 37 is smaller than a rotational force between the opening or closing ends 22 and the rotary guide 33 and between the rotary guide 33 and the fastening part 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a piping clamp for connecting flow path components such as piping and fluid equipment, and a sanitary piping connection structure using the piping clamp.

Conventionally, various pipe clamps, joint devices, and the like have been used to connect flow path components such as pipes and fluidic devices.
For example, in Patent Document 1 below, a flange portion provided at an end portion of a pipe is provided with a plurality of outer inclined surfaces whose inclination angles are gradually reduced, and the flange portion is clamped by a clamp member to thereby increase the fastening force. There has been proposed a flange joint device which is designed to be strengthened.

  In this Patent Document 1, since the force required for opening and closing the clamp is increased by strengthening the fastening force, a friction coefficient reduction process is applied to the surface of the flange portion, the concave surface of the clamp member, the external thread, the internal thread, the washer and the like. The force required to open and close the clamp has been reduced.

JP 2004-197827 A

However, since the piping member is frequently subjected to an impact load or vibration during operation, the flange portion or the clamp member is likely to be displaced or detached due to the impact or vibration.
However, in Patent Document 1, in order to reduce the force necessary for opening and closing the clamp and improve the operability, the friction coefficient is reduced on the surface of the flange portion into which the clamp member is fitted, the inner surface of the clamp member, the screw, the washer, and the like. The treatment made it easy to slide.
For this reason, the fastening force between the flange portion and the clamp member is likely to decrease due to impact or vibration, and the operability of the connection work can be improved, but the bonding force between the piping members tends to decrease. It was.

  Therefore, an object of the present invention is to provide a piping clamp and sanitary piping connection structure that can easily connect and remove the connection ends of the flow path component members and easily maintain the joining force.

The piping clamp of the present invention that achieves the above object includes a support body that can be opened and closed to support the connection ends of the flow path component members in a connected state, and a coupling tool that connects between the opening and closing ends provided on the support body. The connecting tool includes a erection part that is detachably installed between the opening and closing end parts, and a tightening part that is screwed into the erection part and pressurizes the opening and closing end part to tighten the support. In the pipe clamp, the connector includes a rotation guide disposed around the installation portion and sandwiched between the open / close end portion and the tightening portion, and the rotation guide includes a plurality of rotation pieces that are relatively rotatable. In addition, the resistance force of rotation between the plurality of rotating pieces is made smaller than the resistance force between the open / close end portion and the rotating guide and between the rotating guide and the tightening portion.
In this piping clamp, it is preferable that rolling elements are sandwiched between a plurality of rotating pieces.

  The clamp for piping of the present invention has a male screw part on one of the installation part and the tightening part and a female screw part on the other, the male screw part is inserted into the rotation guide, and the rotation guide is locked to the male screw part. It is good to be. The male screw portion or the female screw portion is preferably provided with a knob portion that is rotated by fingers.

  The sanitary piping connection structure of the present invention is such that the connection ends of a plurality of flow path component members are connected to each other by the piping clamp as described above, and flange portions project from the connection ends of the plurality of flow path configuration members, respectively. The flange portion is surrounded and supported by the piping clamp in a state where the flange portions face each other.

According to the piping clamp of the present invention, the rotation guide is sandwiched between the opening / closing end portion of the support and the tightening portion of the coupling tool, and the rotation guide has a plurality of rotating pieces that are relatively rotatable. Therefore, the resistance force with respect to the rotation between the open / close end portion of the support and the tightening portion of the coupler can be reduced.
Therefore, when rotating and tightening the tightening portion screwed to the installation body, the tightening portion can be rotated by relative rotation between the rotating pieces, and between the opening / closing end portion of the support body and the rotation guide and rotation There is no sliding part between the guide and the tightening part.

  Thereby, even if it pressurizes, a fastening part can be smoothly rotated with respect to the opening-and-closing end part of a support body, and a big frictional resistance does not arise. Therefore, it is easy to rotate the tightening portion regardless of whether it is tightened or relaxed, and the connection and removal work of the flow path component can be easily performed.

  In addition, since it is easy to rotate the tightening portion by reducing the rotation resistance force between the rotating pieces of the rotation guide, the resistance force against the movement between the open / close end portion and the rotation guide and the rotation guide The resistance force against the movement between the fastening portion and the tightening portion can be increased regardless of the rotational resistance force between the plurality of rotating pieces. Therefore, the tightening portion does not easily move with respect to the opening / closing end portion of the support.

  As a result, even if it is easy to sufficiently rotate the tightening portion with respect to the support body, the tightening portion is difficult to move with respect to the support body and the connection portion, and even if an impact load or vibration acts, the connection tool Does not come off or loosen. Therefore, the connecting tool is not displaced with respect to the support, causing wear and scratches, and plating does not peel off.

  Therefore, according to the present invention, it is possible to provide a piping clamp and sanitary piping connection structure that can easily maintain the joining force and can easily connect and remove the connection ends of the flow path component members.

It is a perspective view which shows the connection edge part vicinity of the flow-path structural member connected by the clamp for piping which concerns on embodiment of this invention, and shows the state before a connection. It is a perspective view which shows the connection edge part vicinity of the flow-path structural member connected by the clamp for piping which concerns on embodiment of this invention, and shows the state after a connection. It is a partial expanded sectional view of the clamp for piping concerning the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, a description will be given using an example of a sanitary piping connection structure in which a plurality of flow path components are connected by piping clamps.
The flow path component is a member through which a fluid such as a liquid flows. For example, it is not particularly limited as long as the fluid is transferred between members connected to each other, such as piping members such as piping and piping joints, and various fluid devices such as pumps and storage tanks.

[Clamp for piping]
As shown in FIG.1 and FIG.2, the flange part 13 is protrudingly provided by the connection end 12 of the some flow-path structural member 11 connected by this connection structure, respectively. These flange portions 13 are arranged in a state where they are in contact with each other in the opposite direction with a gasket 14 interposed therebetween, and are clamped by a piping clamp 20. The clamp 20 for piping supports the flange parts 13 in a connected state by surrounding and tightening the outer peripheral edges of the pair of flange parts 13 that face each other.

  The pipe clamp 20 of this connection structure connects between an openable / closable support 21 that supports the connection ends 12 of the flow path component 11 in a connected state and a pair of open / close ends 22 provided on the support 21. And a connecting tool 30.

The support body 21 has a plurality of support pieces 23 that can be opened and closed, and each support piece 23 is connected to be swingable via a link portion 24. Both ends of the series of support pieces 23 form a pair of open / close end portions 22, and can be opened and closed by swinging the support pieces 23. Each support piece 23 is provided with a fitting groove 25 for fitting the outer peripheral portion of the flange portion 13 of the flow path component 11.
When the support body 21 is closed as shown in FIG. 2, the pair of flange portions 13 in a state of facing each other are fitted into the fitting grooves 25 of the respective support bodies 21, and the outer periphery is surrounded and supported by the support bodies 21. The

  The connector 30 includes a rod-like erection part 31 that is detachably installed between the opening and closing end parts 22, and a tightening part that is screwed into the erection part 31 and pressurizes the opening and closing end part 22 to tighten the support 21. 32 and a rotation guide 33 disposed around the installation portion 31 and sandwiched between the open / close end portion 22 and the tightening portion 32.

  In this embodiment, the erection part 31 is swingably supported by one of the pair of opening / closing end parts 22, and the other opening / closing end part 22 is provided with a receiving groove 26 of the erection part 31. The receiving groove 26 can be engaged and disengaged by swinging the installation part 31 by opening the end part. The erection part 31 is provided with a male screw part 34, and a rotation guide 33 and a tightening part 32 are attached to the male screw part 34.

  The tightening portion 32 is configured as a wing nut including a female screw portion 35 that is screwed into the male screw portion 34 of the installation portion 31, and a knob portion 36 that protrudes from the female screw portion 35 and is rotated by a finger. Yes. The tightening part 32 may be detached from the erection part 31, but here is screwed together with the erection part 31 together with the rotation guide 33.

  The rotation guide 33 has a pair of ring-shaped rotation pieces 37 and a large number of rolling elements 38 sandwiched between the pair of rotation pieces 37, and the pair of rotation pieces 37 is around the axis of the installation part 31. Is relatively rotatable. The rotation guide 33 is a thrust bearing in which a pair of rotating pieces 37 and a rolling element 38 are integrated. The rotation guide 33 is formed in an annular shape, and is locked so that the rotation guide 33 does not fall off from the connector 30 by the male screw portion 34 being inserted and loosely fitted.

A large number of rolling elements 38 of the rotation guide 33 are arranged on the circumferential raceway surface of the rotation piece 37, and loads in the thrust direction from the opening / closing end 22 and the tightening part 32 of the support 21 are respectively rotated pieces. 37 is supported by a large number of rolling elements 38. Therefore, a flat surface in which no gradient is generated at a portion of the seating surface 35a of the female screw portion 35 of the tightening portion 32 and a portion of the surface of the support 21 that contacts the rotating pieces 37, particularly a portion corresponding to the raceway surface of the rolling element 38. Preferably, a flat surface substantially orthogonal to the thrust direction is formed.
Such a flat surface may be provided on the internal thread portion 35 itself of the tightening portion 32 or the open / close end portion 22 itself of the support 21, but other members are arranged between these and the rotation guide 33. It is also possible to provide the member.

  In the rotation guide 33, the resistance force of rotation between the pair of rotation pieces 37 is smaller than the resistance force between the opening / closing end 22 and the rotation guide 33 and the resistance force between the rotation guide 33 and the tightening portion 32. It has become. These resistance forces are relative to each other, and when the open / close end portion 22 of the support body 21, the rotation guide 33, and the tightening portion 32 of the connector 30 are rotated in a pressure-contacted state, a portion with a small resistance force is present. Rotates more easily than parts with high resistance.

  Here, between the opening / closing end portion 22 and the rotation guide 33 and between the rotation guide 33 and the tightening portion 32 are sliding resistances, the space between the pair of rotation pieces 37 is between the rolling elements 38. Although the latter is small because of rolling resistance, in this embodiment, the sliding performance is further reduced between the opening / closing end 22 and the rotation guide 33 and between the rotation guide 33 and the tightening portion 32. Processing may be performed.

[Piping connection method]
Next, a method of connecting a plurality of flow path component members 11 using such a piping clamp 20 will be described.
First, as shown in FIG. 1, by disengaging the erection part 31 of the connector 30 from the receiving groove 26 of the support piece 23, the plurality of support pieces 23 are expanded to open the support 21.
The flange part 13 of the connection end 12 provided in one flow path component member 11 and the flange part 13 of the connection end 12 provided in the other flow path component member 11 are opposed to each other with a gasket 14 interposed therebetween. Let

In this state, the flange portion 13 is surrounded by the support body 21, and as shown in FIGS. 2 and 3, the coupling tool 30 is swung to be engaged with the receiving groove 26 of the support piece 23, and the installation portion 31 is opened and closed in a plurality of ways. It is installed between the end portions 22.
The tightening portion 32 is tightened by supporting and rotating the knob portion 36 with fingers, and the open / close end portion 22 of the support piece 23 and the female screw portion 35 of the tightening portion 32 are interposed with the rotation guide 33 interposed therebetween. Make contact.

Thereafter, when the tightening portion 32 is further tightened, one rotating piece 37 of the rotation guide 33 is pressed against the opening / closing end portion 22 of the support piece 23, and the other rotating piece 37 is pressed against the female screw portion 35 of the tightening portion 32. To do. Then, by rotating the rolling element 38, the rotating piece 37 pressed against the female thread portion 35 of the tightening portion 32 is rotated without rotating the rotating piece 37 pressed against the opening / closing end portion 22 of the support piece 23. Rotate with 32. Accordingly, the tightening portion 32 is rotated without sliding with respect to the opening / closing end portion 22 to increase the pressure.
By tightening the tightening portion 32 until a sufficient pressure is applied, the connection between the plurality of flow path component members 11 is completed.

[Function and effect]
According to the piping clamp 20 as described above, the rotation guide 33 is sandwiched between the open / close end portion 22 of the support 21 and the tightening portion 32 of the coupler 30, and the rotation guide 33 is relatively rotatable. Since the pair of rotating pieces 37 are provided, the resistance force against the rotation between the opening / closing end portion 22 of the support 21 and the tightening portion 32 of the connector 30 can be reduced.

  Therefore, when the tightening portion 32 screwed to the installation portion 31 is rotated and tightened, the tightening portion 32 can be rotated by the relative rotation between the rotating pieces 37, in particular, the rolling element 38. No sliding portion is generated between the open / close end 22 of the motor 21 and the rotation guide 33 and between the rotation guide 33 and the tightening portion 32. Thereby, even if the pressurizing force is increased, the tightening portion 32 of the support 21 can be smoothly rotated with respect to the open / close end portion 22, and a large frictional resistance is not generated as in the case of sliding. Therefore, it is easy to rotate the tightening portion 32 even when tightening or when it is relaxed, and the connection and removal work of the flow path component 11 can be easily performed.

  In addition, since the rotation resistance force between the plurality of rotating pieces 37 of the rotation guide 33 is reduced, the tightening portion 32 is only easily rotated. Therefore, the movement between the open / close end portion 22 and the rotation guide 33 is facilitated. The resistance force against the movement between the rotation guide 33 and the tightening portion 32 can be increased regardless of the rotation resistance force between the plurality of rotation pieces 37. Therefore, the tightening portion 32 does not easily move with respect to the opening / closing end portion 22 of the support 21 and the tightening portion 32 does not easily rotate excessively with respect to the connecting portion.

Thereby, even if it is easy to rotate the fastening part 32 sufficiently with respect to the support body 21, it can be made difficult to move the fastening part 32 with respect to the support body 21 or the connection part, and the flow path component member Even if an impact load, vibration, or the like is applied from 11, the connector 30 is not detached or loosened. Therefore, it is possible to prevent the connector 30 from being displaced with respect to the support 21 to cause wear and scratches, or peeling of the plating.
Therefore, if such a piping clamp 20 is used, the connection ends 12 of the flow path component member 11 can be easily connected and detached, and the joining force can be easily maintained.

  Further, in this piping clamp 20, one of the installation portion 31 and the tightening portion 32 has a male screw portion 34 and the other has a female screw portion, and the male screw portion 34 is inserted into the rotation guide 33 and locked. Therefore, it is possible to reliably prevent the rotation guide 33 portion from being detached from the connecting portion.

  Further, according to this piping clamp 20, since the knob portion 36 is provided on the male screw portion 34 or the female screw portion to be supported and rotated by the fingers, it is tightened by rotating the knob portion 36 with the fingers. The part 32 can be rotated and tightened or relaxed. Here, even if the pressurizing force is increased, the tightening portion 32 can be smoothly rotated with respect to the open / close end portion 22, and a large frictional resistance is not generated unlike sliding, so the knob portion 36 is rotated by fingers. Even if it is made, it is easy to rotate the tightening part 32.

  Further, according to the sanitary piping connection structure as described above, the piping end 20 is used to connect the connection ends 12 of the plurality of flow path component members 11 to form a sanitary piping flow path. Therefore, when frequently performing processing such as cleaning and sterilization of the flow path component member 11, removal and connection of these members can be easily performed.

[Modification]
In addition, the said embodiment can be suitably changed within the scope of the present invention.
For example, in the above-described embodiment, an example in which the rotation guide 33 is provided separately from the opening / closing end 22 of the support 21 and the tightening portion 32 of the coupler 30 is not particularly limited. You may integrate by fixing the one rotation piece 37 to the edge part 22 or the fastening part 32. FIG.
In the above-described embodiment, the rotation guide 33 is configured by the pair of rotating pieces 37 sandwiching the rolling elements 38. However, for example, the rotating pieces and the rolling elements can be arranged in a plurality of stages. Furthermore, you may comprise a rotation guide by making a rotating contact | abutting and reducing sliding resistance, without arrange | positioning a rolling element between several rotation pieces.
In the above-described embodiment, the support body 21 connects a plurality of support pieces 23 in series so that the pair of opening and closing end portions 22 provided at both ends can be opened and closed by the connecting tool 30. You may connect the pieces 23 so that opening and closing is possible by the connection tool 30 in several places for every opening-and-closing end part 22, respectively.
Further, in the above, the erection part 31 of the coupling tool 30 is supported by the one open / close end part 22 so as to be swingable. For example, the fastening part 32 and the rotation guide 33 are attached to both ends of the erection part 31, respectively. The tool 30 can be detachable from the support 21.
In the above embodiment, the example in which the male thread part 34 is provided in the installation part 31 and the female screw part is provided in the tightening part 32 has been described, but the female screw part is provided on the distal end side of the installation part 31 and the male screw of the tightening part 32 is provided. It is also possible to adopt a structure in which the parts are screwed together.

DESCRIPTION OF SYMBOLS 11 Flow path component 12 Connection end 13 Flange part 14 Gasket 20 Piping clamp 21 Support body 22 Opening-closing end part 23 Support piece 24 Link part 25 Fitting groove 26 Receiving groove 30 Connecting tool 31 Construction part 32 Fastening part 33 Rotation guide 34 Male thread part 35 Female thread part 36 Knob part 37 Rotating piece 38 Rolling element

Claims (5)

An openable / closable support body that supports the connection ends of the flow path component members in a connected state, and a connection tool that connects between the open / close ends provided on the support body. In a piping clamp comprising: an erection part detachably installed between the parts; and a tightening part that is screwed into the erection part and pressurizes the open / close end to tighten the support.
The connector includes a rotation guide that is disposed around the erection part and is sandwiched between the opening / closing end part and the tightening part,
The rotating guide has a plurality of rotating pieces that are relatively rotatable, and provides resistance to rotation between the rotating pieces between the opening / closing end portion and the rotating guide and between the rotating guide and the tightening portion. Clamp for piping smaller than the resistance force between.   The piping clamp according to claim 1, wherein a rolling element is sandwiched between the plurality of rotating pieces.   One of the installation portion and the tightening portion has a male screw portion and the other has a female screw portion. The male screw portion is inserted through the rotation guide, and the rotation guide is locked to the male screw portion. The clamp for piping according to claim 1 or 2.   The piping clamp according to claim 3, wherein the male screw portion or the female screw portion is provided with a knob portion that is rotated by a finger. It is a sanitary piping connection structure in which the connection ends of the plurality of flow path components are connected by the piping clamp according to any one of claims 1 to 4.
A sanitary piping connection structure in which flange portions project from the connection ends of the plurality of flow path component members and are surrounded and supported by the piping clamp in a state where the flange portions face each other.

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