JP5600701B2 - Marking jig - Google Patents

Description

  The present invention relates to a marking jig for marking an outer peripheral surface of a circular pipe in pipe connection.

  In general, in pipe connection using pipe joints such as vinyl chloride pipes (vinyl chloride pipes), the connection allowance (insertion allowance) is determined according to the diameter of the circular pipe, and the circular pipe to be connected is set to a predetermined value. It is necessary to insert up to the position. For this reason, an operator at the work site applies a scale to the end of the pipe to be connected, and marks the connection allowance corresponding to each pipe diameter over the entire circumference on the outer peripheral surface of the pipe using a pen or the like. Work is being done. In such operations, a marking jig for marking a connection allowance may be used.

  Patent Documents 1 and 2 disclose a marking jig for marking a connection allowance on the outer peripheral surface of a circular pipe. The marking jigs disclosed in Patent Documents 1 and 2 are arranged along the tube axis direction of the tube when the tube end contact portion that contacts the end port of the circular tube and when the tube end contact portion contacts the end port of the tube. And a main body provided with a plurality of marking holes or slits corresponding to the connection allowance of circular pipes of various diameters. When using such a marking jig, the tube end contact portion is applied to the end of the circular tube, and the tip of a writing instrument such as a pen is applied to the outer peripheral surface of the circular tube through the marking hole or slit, The marking jig is moved in the circumferential direction along the outer peripheral surface of the circular pipe. Thereby, a connection allowance can be marked on the outer peripheral surface of a circular pipe over the perimeter.

JP 2001-289354 A JP 2007-253242 A

  However, the marking jigs of Patent Documents 1 and 2 are configured with the tube end abutting part and the main body part as main components, and since there are no easily gripped parts, when performing work, For example, it is difficult to perform an operation of moving the marking jig along the outer peripheral surface of the circular pipe while holding the writing instrument in the other hand while fixing the circular pipe with one hand. Further, since the marking jig is held with respect to the circular pipe only by applying the pipe end contact portion to the end of the circular pipe, there is also a problem that the marking jig is easily detached from the circular pipe when the marking jig is moved.

  The technology disclosed in this specification has been created in view of the above problems. An object of the technology disclosed in the present specification is to provide a marking jig that is easy to move along the outer peripheral surface of a circular pipe and that is difficult to come off from the circular pipe when moved.

The technology disclosed in this specification includes a tube end abutting portion that abuts on an end port of a circular tube, and a tube end abutting portion from the end of the circular tube that abuts on the tube end abutting portion toward the inside of the tube. An extending portion that extends, a gripping portion that extends from the end of the circular tube that is in contact with the tube end contact portion toward the outer side of the tube diameter so as to be grippable from the tube end contact portion, and the tube The tube end abutment extends from the tube end abutting portion along the outer peripheral surface of the circular tube in contact with the end abutting portion in the cylinder axis direction of the circular tube, and corresponds to the connection allowance of the circular tube of each diameter. A main body portion provided with a plurality of marking holes at predetermined positions from the contact portion, and the tube end contact portion is inclined toward a flat surface parallel to the tube diameter direction and an end port of the circular tube. The tube end abutting portion has inclined surfaces respectively provided at both ends in a direction perpendicular to the tube axis direction of the circular tube, and only the tip of the inclined surface abuts the end port of the circular tube. On marking jig.

According to such a marking jig, the end of the circular tube is positioned between the extension portion and the main body by bringing the end of the circular tube into contact with the tube end contact portion. In contrast, a marking jig is held. In this state, the gripping portion can be easily gripped, and the marking jig can be easily moved by moving the gripping portion. For example, while fixing the circular tube with only one hand, the outer periphery of the circular tube The marking jig can be easily moved along the surface. Further, when the marking jig is moved along the outer peripheral surface of the circular tube, even if the main body portion is separated from the outer peripheral surface of the circular tube, the inner surface side of the extending portion extending toward the inside of the tube is the inner peripheral surface of the circular tube. Therefore, the marking jig can be prevented from coming off the circular tube. In this way, it is possible to realize a marking jig that is easy to move along the outer peripheral surface of the circular tube and that is difficult to come off from the circular tube when moved. Furthermore, since only the tip of the second inclined surface in the tube end abutting portion is in contact with the end of the circular tube, the end of the circular tube and the tube end are compared with the case where the entire surface of the tube end abutting portion is a flat surface. Since the contact area with the contact portion is reduced, friction between the end of the circular tube and the tube end contact portion accompanying the movement of the marking jig can be reduced. In particular, the difference becomes significant when the end of the circular tube has a rough cross section. For this reason, the marking jig can be easily moved along the outer periphery of the circular tube.

The main body portion and the extending portion may be arranged at a predetermined distance.
According to this configuration, the distance between the main body portion and the extension portion is adjusted along the outer peripheral surface of the circular tube so that the end port of the circular tube having various tube diameters can be brought into contact with the tube end contact portion. In addition to being easy to move and difficult to come off from the end of the circular pipe when moved, a marking jig that can accommodate circular pipes with various pipe diameters can be realized.

When the flat surface of the tube end contact portion is a second flat surface, and the inclined surface of the tube end contact portion is a second inclined surface, the main body portion is a first flat surface, A first inclined surface, and the first inclined surface is inclined toward the outer peripheral surface side of the circular tube that is in contact with the tube end contact portion, and the cylindrical axis direction of the circular tube in the main body portion It may be provided at both ends in the orthogonal direction.
According to this configuration, when the main body rattles when moving the marking jig along the outer peripheral surface of the circular tube, either one of the two first inclined surfaces abuts on the outer peripheral surface of the circular tube. It can prevent that the main-body part shakes any more. For this reason, when moving a marking jig along the outer peripheral surface of a circular pipe, it can prevent that a main-body part shakes largely.

The marking hole may include a plurality of pairs of holes provided at a predetermined interval.
According to this configuration, it is possible to provide a distance between two pairs of holes so as to be a distance between, for example, a joint insertion mark line and a construction mark line corresponding thereto. In this case, by once aligning the marking jig, the joint insertion mark line and the construction mark line can be marked, and the labor of aligning the marking jig a plurality of times can be saved.

  According to the technique disclosed in the present specification, it is possible to provide a marking jig that can be easily moved along the outer peripheral surface of the circular tube and that is difficult to be detached from the circular tube when the circular tube is moved.

The perspective view which looked at the marking jig 10 from the front side The perspective view which looked at the marking jig 10 from the back side Front view of the marking jig 10 attached to the pipe end 32 of the pipe 30 FIG. 4 is a cross-sectional view taken along the line iv-iv in FIG. 3, and is a cross-sectional view of the pipe and the marking jig 10 in a state of being attached to the pipe end 32 of the pipe 30. The rear view which looked at the pipe end 32 vicinity of the piping 30 of the state to which the marking jig 10 was attached from the inside of a pipe | tube. The perspective view which shows the use condition at the time of attaching and marking the marking jig 10 to the pipe end 32 of the piping 30

  The embodiment will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 and 2, the marking jig 10 according to the embodiment is formed by connecting two bent metal plates 2 and 6 at substantially right angles so as to form an L-shape in cross section. The tube end contact portion 18, the extension portion 16, the main body portion 12, and the grip portion 20 are provided. Note that the two plate members 2 and 6 are connected by connecting members 4 and 4 at the connection portions.

  The tube end abutting portion 18 has a plate shape, and includes a connecting portion between the two plate materials 2 and 6 that are bent as described above. Specifically, a small plate surface of the two large and small plate surfaces of the one folded plate member 2 and a part of a large plate surface of the two large and small plate surfaces of the other folded plate member 6. Are superimposed (see FIGS. 1 and 2). A part of the inner surface side of the tube end contact portion 18 is in contact with the end port 32 of the circular tube 30. When the tube end contact portion 18 contacts the end port 32 of the circular tube 30, the extending portion 16 has a plate surface from the end port 32 of the circular tube 30 toward the inside of the tube. (Refer to FIG. 5), and is formed by the smaller one of the two large and small plate surfaces of the other folded plate member 6 described above. The gripping part 20 has a plate shape and is made of the same plate surface as the pipe end abutting part 18, and when the pipe end abutting part 18 abuts on the end port 32 of the circular pipe 30, It extends and extends from the pipe end contact portion 18 from the end port 32 toward the outer side of the pipe diameter of the circular pipe 30 (see FIGS. 3 and 6). In addition, since the holding | grip part 20 has comprised plate shape, it can be easily hold | gripped with a hand etc. (refer FIG. 6). When the main body portion 12 abuts the tube end abutting portion 18 against the end port 32 of the circular tube 30, the main body portion 12 extends along the outer peripheral surface 30a of the circular tube 30 from the tube end abutting portion 18 in the tube axis direction of the circular tube. The plate surface extends in a plate shape so as to be orthogonal to the plate surface of the tube end abutting portion 18 (see FIG. 3), and among the two large and small plate surfaces in the one folded plate material 2 described above, It consists of a large plate. Therefore, the extension part 16 and the main body part 12 have plate surfaces parallel to each other.

  Next, the main body 12 will be described in detail. As shown in FIGS. 1 and 2, the main body 12 includes a first flat surface 12a and a first inclined surface 12b. The first flat surface 12 a is a flat surface that is orthogonal to the tube end contact portion 18 and extends so as to be parallel to the extending portion 16. The first inclined surfaces 12b are respectively provided at both ends of the first flat surface 12a. When the tube end abutting portion 18 is in contact with the end port 32 of the circular tube 30, the first inclined surface 12b is formed on the outer peripheral surface 30a side of the circular tube 30. It is provided so as to be inclined (see FIG. 4). A plurality of marking holes 22 are provided in the first flat surface 12a. Each marking hole 22 is provided at a predetermined position from the pipe end abutting portion 18 so as to correspond to the connection allowance of circular pipes of various diameters, and in the vicinity of each marking hole 22, a corresponding position is provided. A scale line 14 is marked. Each of the marking holes 22 has a circular shape and is large enough to insert the tip of a writing instrument such as a pen. Each marking hole 22 is provided in pairs at a predetermined interval that is the interval between the joint insertion mark line and the construction mark line corresponding thereto.

  Next, the tube end contact portion 18 will be described in detail. As shown in FIGS. 1 and 2, the tube end contact portion 18 includes a second flat surface 18a and a second inclined surface 18b. The second flat surface 18 a is a flat surface extending so as to be orthogonal to the extending portion 16 and the main body portion 12. The second inclined surfaces 18b are provided at both ends of the second flat surface 18a, respectively, and face the end port 32 of the circular tube 30 when the tube end contact portion 18 contacts the end port 32 of the circular tube 30. It is provided so that it may incline (refer FIG. 5). Therefore, when the tube end contact portion 18 is brought into contact with the end port 32 of the circular tube 30, only the tip of the second inclined surface 18 b of the tube end contact portion 18 contacts the end port 32 of the circular tube 30. It will be.

  Here, the extension part 16 and the first flat surface 12a of the main body part 12 are arranged with a predetermined distance W therebetween (see FIGS. 1, 2 and 4). This distance W is equal to the width of the tube end contact portion 18. When the tube end contact portion 18 is in contact with the end port 32 of the circular tube 30, the end port 32 of the circular tube 30 is positioned between the extension portion 16 and the main body portion 12. For this reason, by adjusting the distance between the extension portion 16 and the main body portion 12 in consideration of the diameter and curvature of the circular tube 30, the end 32 of the circular tube 30 extends to the circular tube 30 of various diameters. It is possible to make contact with the tube end contact portion 18 in a state of being positioned between the protruding portion 16 and the main body portion 12, and the marking jig 10 according to the present embodiment is made to correspond to the circular tubes 30 of various diameters. be able to. Further, it is possible to cope with a thick circular tube 30 in which a heat insulating material or the like is enclosed on the inner periphery.

  The above is the configuration of the marking jig 10 according to the embodiment, and the usage mode will be described. When performing a marking operation using the marking jig 10, as shown in FIG. 6, the operator applies the tube end contact portion 18 to the end port 32 of the circular tube 30 with one hand and holds the grip portion 20. The circular tube 30 is fixed. Then, holding the pen 40 with the other hand, the tip 40 a of the pen 40 is inserted into the marking hole 22 and applied to the outer peripheral surface 30 a of the circular tube 30. In this state, the tip 40a of the pen 40 is guided by the marking hole 22 by moving the marking jig 10 along the outer circumferential surface 30a of the circular tube 30 in the circumferential direction. The mark line ML can be accurately attached along the direction. Accordingly, the marking jig 10 can be moved while fixing the circular tube 30 with only one hand. At this time, even if the first flat surface 12a of the main body 12 is separated from the outer peripheral surface 30a of the circular tube 30, the end port 32 of the circular tube 30 is located between the extension 16 and the main body 12. The state in which the inner surface side of the extending portion 16 abuts on the inner peripheral surface 30 b of the circular tube 30 and the end port 32 of the circular tube 30 is located between the extending portion 16 and the main body portion 12 is maintained. This prevents the marking jig 10 from being detached from the circular tube 30.

  As described above, in the marking jig 10 according to the embodiment, the end port 32 of the circular tube 30 is brought into contact with the tube end contact portion 18 by bringing the end port 32 of the circular tube 30 into contact with the tube end contact portion 18. In this state, the marking jig 10 is held with respect to the circular tube 30. In this state, the gripping portion 20 can be easily gripped, and the marking jig 10 can be easily moved by moving the gripping portion 20, so that the circular tube 30 is fixed with only one hand, for example. The marking jig 10 can be easily moved along the outer peripheral surface 30 a of the circular tube 30. Furthermore, even when the main body 12 moves away from the outer peripheral surface 30a of the circular tube 30 when the marking jig 10 is moved along the outer peripheral surface 30a of the circular tube 30, the inner surface of the extending portion 16 extends toward the inside of the tube. Since the side abuts against the inner peripheral surface 30 b of the circular pipe 30, it is possible to prevent the marking jig 10 from being detached from the circular pipe 30. In this way, it is possible to realize the marking jig 10 that is easy to move along the outer peripheral surface 30a of the circular tube 30 and that is difficult to be detached from the circular tube 30 when moving.

  In the marking jig 10 according to the embodiment, the distance between the main body portion 12 and the extension portion 16 is adjusted so that the end port 32 of the circular tube 30 with various tube diameters can be in contact with the tube end contact portion 18. By doing so, in addition to being easy to move along the outer peripheral surface 30a of the circular tube 30 and not easily coming off from the end port 32 of the circular tube 30, it is possible to cope with the circular tube 30 having various tube diameters. The jig 10 can be realized.

  Moreover, in the marking jig 10 which concerns on embodiment, the main-body part 12 has the 1st flat surface 12a and the 1st inclined surface 12b. The first inclined surface 12b is inclined toward the outer peripheral surface 30a side of the circular tube 30 in contact with the tube end contact portion 18, and the cylindrical axis direction (Z-axis direction) of the circular tube 30 in the main body portion 12. Are provided at both ends in a direction orthogonal to the direction. Therefore, when the main body 12 rattles when the marking jig 10 is moved along the outer peripheral surface 30 a of the circular tube 30, one of the two first inclined surfaces 12 b and 12 b is the outer periphery of the circular tube 30. Since it abuts on the surface 30a, it is possible to prevent the main body portion 12 from shaking further. Thereby, when moving the marking jig 10 along the outer peripheral surface 30a of the circular pipe 30, it can prevent that the main-body part 12 shakes largely.

  In the marking jig 10 according to the embodiment, the tube end abutting portion 18 is provided so as to be inclined toward the second flat surface 18 a parallel to the tube diameter direction and the end port 32 of the circular tube 30. And an inclined surface 18b. And the 2nd inclined surface 18b is each provided in the both ends of the direction orthogonal to the cylinder axis direction (Z-axis direction) of the circular tube 30 in the pipe end contact part 18. As shown in FIG. For this reason, only the tip of the second inclined surface 18b in the tube end abutting portion 18 abuts on the end port 32 of the circular tube 30, and compared with the case where the entire surface of the tube end abutting portion 18 is a flat surface. Since the contact area between the end port 32 of the tube 30 and the tube end contact portion 18 is reduced, the friction between the end port 32 of the circular tube 30 and the tube end contact portion 18 accompanying the movement of the marking jig 10 can be reduced. it can. In particular, when the end port 32 of the circular tube 30 has a rough cross section, the difference becomes significant. As a result, the marking jig 10 can be easily moved along the outer periphery of the circular tube 30.

  Moreover, in the marking jig 10 which concerns on embodiment, the marking hole 22 may consist of the some hole which makes the pair provided in the predetermined space | interval. Thereby, the space | interval of two holes which make a pair can be provided so that it may become a space | interval between the mark line for joint insertion, and the mark line for construction corresponding to it, for example. In this case, by once aligning the marking jig, the joint insertion mark line and the construction mark line can be marked, and the labor of aligning the marking jig 10 a plurality of times can be saved.

The modifications of the above embodiment are listed below.
(1) In the above-described embodiment, the configuration in which the main body portion and the extending portion are parallel to each other is illustrated. However, a configuration in which the main body portion and the extending portion are not parallel to each other may be used.

(2) In the above-described embodiment, the configuration in which the first inclined surface is provided at both ends of the main body is exemplified. However, the first inclined surface only needs to be inclined toward the outer surface side of the circular pipe, The arrangement is not limited.

(3) In the above embodiment, the configuration in which the tube end contact portion has the second flat surface and the second inclined surface is exemplified, but the configuration of the tube end contact portion is not limited. For example, the tube end abutting portion may be composed only of a flat surface.

(4) In the above embodiment, the configuration in which a plurality of marking holes are provided in the main body is illustrated, but the shape of the opening for inserting the tip of the pen is not limited. For example, a configuration in which a plurality of slits are provided in the main body may be used.

(5) In the above embodiment, the extending portion and the gripping portion are illustrated as extending from the tube end contact portion in a plate shape, but the mode in which the extending portion and the gripping portion extend is not limited.

  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.

  2, 6 ... Plate material, 4 ... Connection member, 10 ... Marking jig, 12 ... Main body part, 12a ... First flat surface, 12b ... First inclined surface, 14 ... Scale, 16 ... Extension part, 18 ... Pipe end abutment 18: second flat surface, 18b: second inclined surface, 20 ... gripping portion, 22 ... marking hole, 30 ... circular tube, 30a ... outer peripheral surface of circular tube, 30b ... inner peripheral surface of circular tube, 32 ... End, 40 ... Pen, 40a ... Pen tip

Claims (4)

A tube end abutting portion that abuts the end of the circular tube;
An extending portion extending from the tube end contact portion toward the inside of the tube from the end of the circular tube that is in contact with the tube end contact portion;
A gripping portion extending so as to be grippable from the tube end abutting portion toward the outer side of the tube diameter from the end of the circular tube abutting on the tube end abutting portion;
The tube extends from the tube end abutting portion along the outer peripheral surface of the circular tube in contact with the tube end abutting portion in the cylinder axis direction of the circular tube, and corresponds to the connection allowance of the circular tube of each diameter. A main body provided with a plurality of marking holes at a predetermined position from the end contact portion ,
The tube end abutting portions are respectively inclined to the flat surface parallel to the tube radial direction, and to both ends of the tube end abutting portion in the direction orthogonal to the tube axis direction of the circular tube. A marking jig comprising: an inclined surface provided; and only a tip of the inclined surface is in contact with an end of the circular tube.   The marking jig according to claim 1, wherein the main body portion and the extending portion are arranged at a predetermined distance. When the flat surface of the tube end contact portion is a second flat surface, and the inclined surface of the tube end contact portion is a second inclined surface,
The main body has a first flat surface and a first inclined surface,
The first inclined surfaces are inclined toward the outer peripheral surface side of the circular tube in contact with the tube end contact portion, and are provided at both ends of the main body portion in a direction orthogonal to the cylindrical axis direction of the circular tube. It is marking jig according to claim 1 or claim 2, characterized in that is. The marking jig according to any one of claims 1 to 3, wherein the marking hole includes a plurality of pairs of holes provided at a predetermined interval.

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