JP5491559B2 - Piping fixtures and how to use them - Google Patents

Description

  The present invention relates to a pipe fixing tool for fixing a pipe and a method for using the same.

  Generally, in pipe connection using a pipe joint such as a drain pipe, an operation of cutting the pipe is performed in order to adjust the length of the pipe while the pipe is fixed. A pipe fixture may be used for fixing the pipe. As an example of such a pipe fixing tool, a clip-like one that fixes the pipe by holding the outer peripheral surface of the pipe is known. Such a clip-shaped pipe fixture is disclosed in Patent Document 1, for example.

JP-A-11-230124

  By the way, in pipe connection work, after cutting the pipe, a marking for inserting the pipe to be connected from the cut end to a predetermined position set in advance is provided on the outer peripheral surface of the pipe. For this reason, when a pipe fixture is used to fix the pipe, remove the pipe fixture from the pipe after cutting the pipe, and then apply a jig or the like for marking the outer circumference of the pipe to the outer circumference of the pipe. The marking work had to be done.

  The technology disclosed in this specification has been created in view of the above problems. The technology disclosed in this specification is capable of continuously fixing, cutting, and marking a pipe, and can accurately perform marking along a circular cross section of the pipe and a method of using the same. The purpose is to provide.

  The technology disclosed in the present specification includes a pair of sandwiching portions disposed opposite to each other and a leaf spring, and includes a connecting portion that connects between the pair of sandwiching portions. A clip-like pipe fixing tool capable of fixing the pipe by being brought into contact with the plate surface of the connecting part and being held between the pair of holding parts by the spring property of the connecting part, wherein the pair of holding parts Each of the pipes extends so as to be orthogonal to the pipe axis direction of the pipe to which the side edge is fixed, and each of the pair of sandwiching portions has the pipe sandwiched at a predetermined position from the end side. The present invention relates to a pipe fixture having a plurality of marking slits extending in a direction orthogonal to the pipe axis direction.

  According to such a pipe fixture, since it is in the shape of a clip, various pipes with different outer diameters can be made to correspond to each other, and the pipe has three points: a plate surface of the connecting part and a pair of clamping parts. Since it is fixed in a state where it is in contact with the pipe, the pipe can be reliably fixed. And in the state where the pipe is fixed, since the side edge of the clamping part is orthogonal to the pipe axis direction of the pipe, by cutting the pipe while applying a cutting blade or the like to the side edge of the clamping part, The pipe can be cut along a direction orthogonal to the pipe axis direction of the pipe (along the annular cross section). In addition, since the marking slit provided in the clamping part extends in a direction orthogonal to the pipe axis direction of the pipe, by marking with a pen or the like on the outer peripheral surface of the pipe along the marking slit in this state, Marking can be performed parallel to the cut surface (circular cross section) of the pipe (along the direction perpendicular to the pipe axis direction of the pipe). Furthermore, since the piping is securely fixed to the piping fixture, it is possible to prevent the marking line from being displaced when marking. Thus, according to the pipe fixture according to the present invention, it is possible to continuously perform a series of steps of fixing, cutting, and marking of the pipe, as compared with the case of using a marking jig or the like. The marking can be made with high accuracy along the annular cross section of the pipe.

Rubber may be coated on a portion that comes into contact with the pipe, and each of the pair of holding portions may be formed of a bellows-like plate-like member having an obtuse bending angle.
According to this configuration, the coefficient of friction at the contact point between the pipe fixture and the pipe can be increased, and the line connecting the contact points between the pipe fixture and the pipe in a cross-sectional view is an equilateral triangle. By adjusting the bending angle of the clamping portion, the fixed pipe can be made difficult to come off from the pipe fixture. Thereby, piping can be fixed still more reliably.

  Another technique disclosed in the present specification is a method of using the above-described pipe fixing tool, wherein the outer peripheral surface of the pipe is brought into contact with the plate surface of the connecting part and between the pair of holding parts. A fixing step of fixing the pipe by clamping, a cutting step of cutting the pipe along the side edges while applying a cutting blade to the side edges of the pair of clamping parts after the fixing step; And a marking step of marking on the outer peripheral surface of the pipe along the marking slit after the cutting step.

  According to such a method of using a pipe fixture, since a series of steps of fixing, cutting, and marking of a pipe can be performed continuously, compared to the conventional pipe connection work using a pipe joint such as a drain pipe. This makes it possible to shorten the work time.

  According to the technology disclosed in this specification, a pipe fixing tool capable of continuously fixing, cutting, and marking a pipe, and capable of accurately marking along a circular cross section of the pipe, and its A method of use can be provided.

Perspective view of piping fixture 2 Front view of piping fixture 2 Side view of piping fixture 2 Front view of the pipe fixture with the drain pipe 20 fixed Side view of the pipe fixture with the drain pipe 20 fixed The perspective view of the pipe fixture of the state which fixed the drain pipe 20 The perspective view which shows the use condition of the piping fixing tool 2 at the time of fixing the drain pipe 20 The perspective view which shows the use condition at the time of marking on the drain pipe 20 fixed to the piping fixture 2 and the edge part was cut | disconnected. Front view of piping fixture 102 according to a modification

  The embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the pipe fixture 2 according to the embodiment includes a pair of sandwiching portions 4, 4 having a bellows shape and a leaf spring, and the pair of sandwiching portions 4, 4. It is comprised from the connection part 8 which connects between, and is made into the clip shape. And these members which comprise the piping fixture 2 consist of metal materials. In addition, let the upper side in FIG. 1 thru | or FIG. 4 be the upper side in the piping fixture 2, and let the lower side of the figure be the lower side in the piping fixture 2. FIG. Moreover, the piping fixture 2 according to the embodiment can continuously perform a series of steps of fixing, cutting, and marking the drain pipe 20 (an example of piping) described later. The method of using the pipe fixture 2 when performing these series of steps will be described.

  A pair of clamping parts 4 and 4 are comprised from the plate-shaped member bent so that each might form a bellows shape. In the present embodiment, the plate surfaces of the bellows-like plate member are arranged in order from the upper side of the pipe fixture 2 with the gripping portion 6, the connecting portion 10, the first fixing portion 12, the second fixing portion 14, and the contact. This will be referred to as a section 16 (see FIGS. 1 and 2). The pair of sandwiching portions 4 and 4 are arranged in an inclined form so that their upper ends are farthest apart from each other, approach each other downward, and come into contact with each other at their lower ends (contact portions 16). In the meantime, the connection part 8 is connected by the connection part 8 (refer FIG. 2). The gripping part 6 is a part to be gripped when the drain pipe 20 is clamped using the pipe fixing tool 2. The grip 6 has a rounded upper end 6a, and the upper end 6a is coated with rubber so that it can be easily gripped. The connecting portion 10 is a short portion that connects the gripping portion 6 and the first fixing portion 12, and is continuous from the gripping portion 6 so as to be greatly inclined inward from the lower end of the gripping portion 6. The first fixing part 12 and the second fixing part 14 are provided along the outer peripheral surface of the drain pipe 20 when fixing the drain pipe 20, and a part of the first fixing part 12 and the second fixing part 14 abuts on the outer peripheral surface of the drain pipe 20. 20 is pinched. The 1st fixing | fixed part 12 and the 2nd fixing | fixed part 14 are connected so that it may form a dogleg shape in front view. A pair of slit-like first marking slits 12a, 12a extending downward from above is provided on the plate surface of the first fixing portion 12, and the plate surface of the second fixing portion 14 is provided from above. A pair of slit-shaped second marking slits 14a, 14a extending downward is provided. These marking slits 12a and 14a are provided so as to correspond to the connection allowance of pipes of various diameters, and extend so as to be parallel to the side surface 4a (see FIG. 5) of the sandwiching portion 4. The contact portions 16 are configured such that their upper ends are in contact with each other and slightly extend downward from the contact portions.

  The entire connecting portion 8 is a leaf spring, and as shown in FIG. 2, both end portions thereof are bent upward so as to be concave in front view, and the bent both end portions 8 b are gripped by the holding portion 4. The plate 6 is attached to the inner surface of the portion 6 (the side where the pair of sandwiching portions 4 and 4 face each other). Specifically, both end portions 8b, 8b of the connecting portion 8 are attached to the grip portion 6 with screws and bolts and are firmly fixed. The central portion 8a of the connecting portion 8 is located between the pair of sandwiching portions 4 and 4, and is slightly curved toward the outside (the side opposite to the side on which the drain pipe 20 is fixed). Yes. When the drain pipe 20 is fixed, the inner side of the central part 8 a of the connecting part 8 comes into contact with the outer peripheral surface of the drain pipe 20. Note that a rubber sheet 9 is attached to the inside of the central portion 8a of the connecting portion 8 to prevent the outer peripheral surface of the drain tube 20 from being damaged when the drain tube 20 is fixed. Due to the elastic force of the leaf spring in the connecting portion 8, the pair of sandwiching portions 4, 4 are held in a state in which the contact portion 16 is in contact.

  The dimension etc. of each part of the piping fixture 2 which concerns on embodiment are demonstrated. In the clamping part 4, the length of the grip part 6 (vertical direction) is 30 mm, the length of the connecting part 10 is 10 mm, the length of the first fixing part 12 is 20 mm, and the second fixing part 14 Is 22 mm in length. As shown in FIG. 2, the gripping portion 6 and the connecting portion 10 are connected at an angle θ1 of 148 °, and the connecting portion 10 and the first fixing portion 12 are connected at an angle θ2 of 145 °. The first fixing portion 12 and the second fixing portion 14 are connected at an angle θ3 of 145 °, and the second fixing portion 14 and the contact portion 16 are connected at an angle θ4 of 135 °. . Therefore, the bending angle of each of the pair of sandwiching portions 4 and 4 having a bellows shape is an obtuse angle. The drain tube 20 can be suitably fixed by forming the clamping part 4 with such dimensions and angles. As shown in FIG. 3, in the first fixing portion 12, the first marking slit 12 a on the side closer to the one side edge 4 a of the sandwiching portion 4 has a distance W1 from the side edge of 19 mm. . Further, in the second fixing portion 14, the second marking slit 14a on the side closer to the one side edge 4a of the sandwiching portion 4 has a distance W3 from the side edge of 26 mm. In the first fixing portion 12 and the second fixing portion 14, the distance W2 between the pair of first marking slits 12a and 12a and the distance W4 between the pair of second marking slits 14a and 14a are each 10 mm. Yes. By providing the marking holes with such dimensions 12a and 14a, it is possible to cope with the connection allowance of circular pipes of various diameters.

  Next, a fixing mode when the drain pipe 20 is fixed by the pipe fixing tool 2 will be described with reference to FIG. When the drain pipe 20 is fixed by the pipe fixing tool 2, the gripping portions 6 of the pair of sandwiching portions 4, 4 are respectively gripped and applied with force so that the sandwiching portions are opposed to the elastic force of the leaf spring of the connecting portion 8. The four contact portions 16 are separated from each other, and the drain pipe 20 is sandwiched between the pair of sandwiching portions 4 and 4. The drain pipe 20 sandwiched between the pair of sandwiching portions 4 and 4 has an outer peripheral surface that is an inner surface of the connecting portion 8 (specifically, an inner surface of the rubber sheet 9) and a pair of second fixing portions. 14 and 14 are in contact with and supported by three inner surfaces. And the force which goes to the center of a pipe diameter is added with respect to the outer peripheral surface of the drain pipe 20 in the said three places with the elastic force by the leaf | plate spring of the connection part 8. FIG. In addition, rubber | gum (not shown) is coated on the inner surface in a pair of 2nd fixing | fixed part 14 and 14, and when this supports the drain pipe 20, the outer peripheral surface of the drain pipe 20 may be damaged. It is prevented. As described above, the pipe fixture 2 can support the drain pipe 20 at three locations and can reliably fix the drain pipe 20 by the elastic force of the leaf spring of the connecting portion 8. Moreover, since the pipe fixing tool 2 is formed into a clip shape as a whole by the leaf spring of the connecting portion 8, the force applied when gripping the grip portion 6 is changed to change the size of the pair of sandwiching portions 4 and 4 to be opened. Accordingly, various drain pipes 20 and other pipes having different outer diameters can be sandwiched between the pair of second fixing parts 14 and 14. The drain pipe 20 is fixed as described above by bringing the outer peripheral surface of the drain pipe 20 sandwiched between the pair of second fixing parts 14 and 14 into contact with the inner surface of the connecting part 8. It becomes. In the pipe fixture 2 in a state where the drain pipe 20 is fixed in this way, the line connecting the three abutting portions is a substantially equilateral triangle in a front view. In the state where the drain pipe 20 is securely fixed, the direction in which the side edge of the clamping portion 4 extends in the pipe fixing tool 2 (vertical direction in FIG. 5) and the pipe axis direction of the fixed drain pipe 20 (FIG. 5). In the right-and-left direction).

  The above is the configuration of the pipe fixture 2 according to the embodiment. Next, a method of using the pipe fixture 2 will be described. In a series of steps for fixing, cutting, and marking the drain pipe 20, first, as shown in FIG. 7, the gripping part 6 of the pipe fixture 2 is gripped to open the pair of clamping parts 4 and 4, and Thus, a part of the drain pipe 20 is securely fixed by the pipe fixing tool 2 (an example of a fixing process). In the fixing step in the present embodiment, the drain pipe 20 is fixed so that the end 20a of the drain pipe 20 slightly protrudes (see FIGS. 5 and 6). In this state, the end port 20e of the drain pipe 20 is not always orthogonal to the pipe axis direction of the drain pipe 20 (left-right direction in FIG. 5). Next, the drain pipe 20 is fixed in a state where the drain pipe 20 is securely fixed to the pipe fixing tool 2, and the cutting blade of the cutting tool is connected to one side edge (specifically, the clamping part 4 of the pipe fixing tool 2). 4a, and the end 20a of the drain pipe 20 is cut along the side edge 4a. That is, the drain pipe 20 is cut along the alternate long and short dash line A in FIG. 5 (an example of a cutting step). Here, since the one side edge 4a of the clamping part 4 is orthogonal to the tube axis direction of the fixed drain pipe 20, by cutting the drain pipe 20 as described above, The end port 20f (see FIG. 8) of the drain pipe 20 is along a direction orthogonal to the pipe axis direction of the drain pipe 20. Note that a manual cutting blade such as a saw may be used for cutting the drain tube 20, or an electric cutting blade may be used.

  Next, marking is performed on the drain pipe 20 after cutting (an example of a marking process). When the marking operation is performed on the drain pipe 20 fixed using the pipe fixing tool 2, as shown in FIG. 8, the operator fixes the drain pipe 20 with one hand and the pen 30 with the other hand. The tip 30 a of the pen 30 is inserted into the first marking slit 12 a or the second marking slit 14 a and applied to the outer peripheral surface of the drain pipe 20. In this state, by moving the tip 30a of the pen 30 along the marking slits 12a and 14a, the mark line ML can be attached to the outer peripheral surface of the drain pipe 2 along the circumferential direction. At this time, since the pipe fixture 2 and the drain pipe 20 are firmly fixed to each other, the pipe fixture 2 is not displaced when performing the mark king. As a result, the mark line ML is accurately set. Can be pulled. Further, the end port 20f of the drain pipe 20 after cutting and the one side edge 4a of the clamping portion 4 in the pipe fixture 2 are parallel to each other, and the one side edge 4a and the marking slits 12a and 14a Therefore, the mark line ML attached as described above is parallel to the end 20f of the drain pipe 20 after cutting. In other words, the mark line ML is orthogonal to the tube axis direction of the drain tube 20 (vertical direction in FIG. 8). Therefore, by connecting another pipe to the end port 20f of the drain pipe 20 after cutting using the mark line ML attached by the marking process as a connection allowance, another pipe with an accurate dimension can be connected from the end port 20f of the drain pipe 20. Can be connected.

  As described above, according to the pipe fixing tool 2 according to the embodiment, since it is in the shape of a clip, various pipes having different outer diameters can be made to correspond to each other, and the drain pipe 2 is a plate surface of the connecting portion 8. And the pair of sandwiching portions 4 and 4 (the pair of second fixing portions 14 and 14) are fixed in contact with the three points, so that the drain pipe 20 can be reliably fixed. When the drain pipe 20 is fixed, the side edge 4a of the clamping part 4 is perpendicular to the tube axis direction of the drain pipe 20, so that a cutting blade or the like is applied to the side edge 4a of the clamping part 4. However, by cutting the drain pipe 20, the drain pipe 20 can be cut along the direction orthogonal to the pipe axis direction of the drain pipe 20 (along the annular cross section). In addition, since the marking slits 12 and 14 provided in the sandwiching portion 4 extend in a direction orthogonal to the tube axis direction of the drain pipe 20, the drain pipe 20 extends along the marking slits 12 and 14 in this state. By marking the outer peripheral surface with a pen 30 or the like, marking can be performed in parallel with the cut surface (circular cross section) of the drain tube 20 (along the direction perpendicular to the tube axis direction of the drain tube 20). Furthermore, since the drain pipe 20 is securely fixed to the pipe fixing tool 2, it is possible to prevent the marking line ML from being displaced when marking. Furthermore, the marking line ML can be accurately attached in a direction orthogonal to the tube axis direction of the drain tube 20, that is, a direction along the annular cross section. As described above, according to the pipe fixing tool 2 according to the embodiment, it is possible to continuously perform a series of steps of fixing, cutting, and marking the drain pipe 20 and using a marking jig or the like. Compared to the above, marking can be performed with higher accuracy along the circular cross section of the drain tube 20.

  Further, in the pipe fixture 2 according to the embodiment, the rubber contact is coated on the portion that comes into contact with the drain pipe 20, and each of the pair of sandwiching portions 4 and 4 is made of a bellows-like plate-like member having an obtuse bending angle. It has become. For this reason, the friction coefficient in the contact location of the pipe fixture 2 and the drain pipe 20 can be increased. Furthermore, since the bending angle of the clamping portion 4 is adjusted so that the line connecting the contact points between the pipe fixture 2 and the drain pipe 20 in a cross-sectional view is an equilateral triangle, the fixed drain pipe 20 is connected to the pipe. It can be made difficult to come off from the fixture 2, and the drain pipe 20 can be more reliably fixed.

  Further, in the method of using the pipe fixture according to the embodiment, the drain pipe 20 is brought into contact with the plate surface of the connecting portion 8 while the drain pipe 20 is held between the pair of holding portions 4 and 4. After the fixing step, the fixing step, the cutting step of cutting the drain pipe 20 along the side edge 4a while applying the cutting blade to the side edge 4a of the pair of sandwiching portions 4, 4, and after the cutting step, A marking step of marking the outer peripheral surface of the drain pipe 20 along the marking slits 12a and 14a. For this reason, a series of steps of fixing, cutting, and marking of the drain pipe 20 can be performed continuously, and the work time can be shortened compared with the conventional pipe connecting work using a pipe joint such as the drain pipe 20. It becomes possible.

  Next, the pipe fixture 102 according to the modification will be described. FIG. 9 is a front view of a pipe fixture 102 according to a modification. In FIG. 9, the part obtained by adding the numeral 100 to the reference sign in FIG. 2 is the same as the part described in FIG. 2, and redundant description of the structure, action, and effect is omitted. The pipe fixture 102 according to the modification is configured such that the upper ends 106a of the grip portions 106 provided on the upper portions of the pair of sandwiching portions 104, 104 are bent outward. Since the upper end 106a of the grip portion 106 is bent in this manner, the grip portion 106 can be more easily gripped when gripping the pair of grip portions 106, 106 from both sides. Further, when the pair of gripping portions 106 and 106 are gripped, the bent portions also serve as a non-slip function that prevents the hand from slipping upward, so that the drain pipe can be fixed more easily. Can be.

The modifications of the above embodiment are listed below.
(1) In the above-described embodiment, an example in which each of the pair of sandwiching portions in the pipe fixture has a bellows shape is illustrated, but the configuration and shape of the sandwiching portion are not limited.

(2) In the above embodiment, an example in which the drain pipe is fixed using the pipe fixing tool is shown, but a pipe other than the drain pipe can also be fixed using the pipe fixing tool.

(3) In the above embodiment, the configuration in which the connecting portion is screwed to the holding portion in the pipe fixture is illustrated, but the manner of attaching the connecting portion to the holding portion is not limited.

(4) In addition to the above-described embodiment, the configuration, shape, and the like of the clamping part and the coupling part in the pipe fixture can be changed as appropriate.

(5) In addition to the above embodiment, the arrangement of the marking holes in the clamping portion of the pipe fixture can be changed as appropriate.

  As mentioned above, although each embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  In addition, the technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

  DESCRIPTION OF SYMBOLS 2 ... Pipe fixing tool, 4 ... Holding part, 6 ... Holding part, 8 ... Connection part, 10 ... Connection part, 12 ... 1st fixing part, 12a ... Slit for 1st marking, 14 ... 2nd fixing part, 14a ... Second marking slit, 16 ... contact portion, 20 ... drain pipe, 20a ... drain pipe end, 20e ... drain pipe end, 20f ... (after cutting) drain pipe end, 30 ... pen, 30a ... Pen tip

Claims (3)

A pair of clamping parts arranged opposite to each other and a connecting part that connects between the pair of holding parts, and makes the outer peripheral surface of the pipe contact the plate surface of the connecting part. A clip-shaped pipe fixing tool capable of fixing the pipe by being clamped between the pair of clamping parts by the spring property of the connecting part,
Each of the pair of sandwiching portions extends so as to be orthogonal to the pipe axis direction of the pipe to which the side edge is fixed,
Each of the pair of clamping parts is provided with a plurality of marking slits extending in a direction perpendicular to the pipe axis direction of the clamped pipe at a predetermined position from the end side. Ingredients. Rubber is coated on the part that comes into contact with the pipe,
The pipe fixture according to claim 1, wherein each of the pair of sandwiching portions includes a bellows-like plate-like member having an obtuse bending angle. A method of using the piping fixture according to claim 1 or 2,
A fixing step of fixing the pipe by bringing the outer peripheral surface of the pipe into contact with the plate surface of the connecting portion and holding the pipe between the pair of holding portions;
After the fixing step, a cutting step of cutting the pipe along the side edges while applying a cutting blade to the side edges of the pair of sandwiching portions;
After the cutting step, a marking step for marking the outer peripheral surface of the pipe along the marking slit,
A method for using a piping fixture, comprising:

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