JP6227746B2 - Marking material - Google Patents

Description

The present invention provides a marking member used for marking along the circumferential direction at a connection end of a pipe when connecting two pipes such as a water supply pipe, a hot water supply pipe, and a drain pipe through a pipe joint. It is about.
The term “tube outer surface contact portion” in the present specification is a basic term in the definition of the present invention, and is provided in a protruding state on the back surface of the marking member main body so that the marking member is addressed to the tube. Regardless of the nominal diameter of the pipe (the size of the pipe), the abutting portion that always abuts and the abutting location changes relatively according to the nominal diameter of the pipe, There are two types of “specific contact portion” which is a planar shape that functions as a “tube outer surface contact portion”, but in two places on the outer surface of the tube with the marking member addressed to the tube Since the points of contact are common, the terms “outer surface contact portion” and “specific contact portion” are used in the meaning described above.
The “nominal diameter” frequently used in this specification refers to the “inner diameter” or “approximate inner diameter” of the pipe used for specifying the size of the pipe.

  The pipe connection allowance is determined by JIS according to the diameter of the pipe and the application. Therefore, in order to connect the pipes, the end portion of the connection allowance determined by each pipe is marked, and then the connection diameter determined by the pipe and the use is secured by the marking. Two pipes are connected via a joint.

  As a member for marking the end position of the pipe connection allowance, those described in Patent Documents 1 to 3 are known. As a configuration common to Patent Documents 1 to 3, it is locked to the end face of the pipe on one end in the longitudinal direction of the marking member body having a flat plate shape or a curved plate shape having a curvature radius far larger than the minimum diameter of the pipe. The pipe end locking part is formed toward the back surface side in a state orthogonal to the marking member body, and the position of the connection margin of each other type of pipe having a different diameter is provided on the front surface side of the marking member body. A large number of marking position index holes for identifying the above are formed.

  And, in order to mark the connection margin of the pipe, the pipe end locking portion of the marking member is locked to the end face of the pipe, and the marking member body having a flat plate shape or a curved plate shape is attached to the outer peripheral surface of the pipe. In the “addressed state” in contact with the marking member, hold the marking member body with one hand, insert the pen tip of the marking pen with the other hand into the specific marking position indicator hole, and The position of the connection margin end was marked on the outer peripheral surface.

  As a matter of course, since the outer peripheral surface of the tube is a continuous curved surface having no uneven portion, the marking member contact portion with respect to the outer peripheral surface of the tube is the above-mentioned “addressed state” of the marking member with respect to the tube. Since there is only one place along the circumferential direction, the “addressed state” of the marking member with respect to the pipe is extremely unstable and easily skids. In particular, during marking, the tip of the marking pen is inserted into the marking position indicator hole, and part of the force acts on the marking member body. In some cases, the marking is made at a position different from the original position.

JP 2000-28053 A JP 2001-289354 A JP 2006-189089 A

  An object of the present invention is to provide a marking member that stabilizes the “addressed state” of the pipe so that the marking operation can be performed stably.

The invention of claim 1 for solving the above problem is a marking member for determining the length of the connection allowance of the pipe to the pipe joint and marking the connection allowance on the outer peripheral surface of the pipe,
The connection allowance of at least two types of pipes having different diameters, and a short plate-shaped marking member main body, a pipe end locking portion projecting on the back side of the marking member main body to be locked to the end surface of the pipe A marking position indicator for indicating a position for marking the end,
On the back surface of the marking member main body, a plurality of tube outer surface contact portions that protrude from the tube end of the tube in the tube axis direction and contact with two outer peripheral surfaces that are displaced along the circumferential direction of the tube protrude. Formed in a state,
The marking position indicator portion and one tube outer surface contact portion among the plurality of tube outer surface contact portions are formed at an end portion on the same side in the width direction of the marking member body ,
In a state where the tube end locking portion is locked to the end surface of the tube having a relatively large nominal diameter, a tube outer surface abutting portion formed at the end on the same side as the marking position indicator portion, and the tube outer surface The abutment portion and another tube outer surface abutment portion adjacent to the abutment portion are configured to abut on two locations displaced along the circumferential direction of the outer peripheral surface of the tube,
In a state where the tube end locking portion is locked to the end surface of a tube having a relatively small nominal diameter, a tube outer surface abutting portion formed at the end on the same side as the marking position indicator portion, and the tube outer surface A plane specific contact portion on the back surface of the marking member body existing between the contact portion and another adjacent tube outer surface contact portion is displaced along the circumferential direction of the outer peripheral surface of the tube. It is characterized by being comprised so that it may contact | abut .

According to the first aspect of the present invention, in a tube having a relatively large nominal diameter, a tube outer surface abutting portion formed at an end portion on the same side as the marking position index portion and the tube outer surface abutting portion are adjacent to each other. In a state where another pipe outer surface abutting portion is in contact with two places displaced along the circumferential direction of the outer peripheral surface of the pipe, that is, in a state where the “addressed state” of the marking member with respect to the pipe is most stable. The connecting margin can be marked on the outer peripheral surface of the pipe by the marking position indicator formed at the end in the width direction of the marking member body.
On the other hand, in a tube having a relatively small diameter, a tube outer surface abutting portion formed at the end on the same side as the marking position indicator portion and another tube outer surface abutting portion adjacent to the tube outer surface abutting portion. The marking position indicator portion in a state in which the flat specific contact portion on the back surface of the marking member main body existing between the two contact portions is displaced along the circumferential direction of the outer peripheral surface of the pipe Thus, the connection margin can be marked on the outer peripheral surface of the pipe.

As a result, according to the first aspect of the present invention, the pipe outer surface abutting portion formed at one end in the width direction of the marking member main body is commonly addressed regardless of the size of the nominal diameter. By the marking position indicator portion provided at one end in the width direction of the marking member similar to the outer surface contact portion, the connection margin can be marked on the outer peripheral surface of the tube, particularly in a tube having a relatively large diameter. Since each adjacent tube outer surface contact portion can be in a state of being directed to the outer peripheral surface of the tube, there is an advantage that marking can be performed stably.

The invention of claim 2 is characterized in that, in the invention of claim 1 , the tube outer surface abutting portion is formed on a protrusion extending along the tube axis direction.

According to the invention of claim 2 , since the tube outer surface contact portion is formed on the protrusion extending along the tube axis direction, the total contact length of the marking member body with respect to the outer peripheral surface of the tube is increased. The “addressing state” of the marking member body with respect to the outer peripheral surface of the tube is stabilized.

The present invention is the same as the tube outer surface contact portion in a state where the tube outer surface contact portion formed at one end portion in the width direction of the marking member body is addressed in common regardless of the size of the nominal diameter. It is provided at one end in the width direction of the marking member, and the connection margin can be marked on the outer peripheral surface of the pipe by a common marking position indicator for all the nominal diameter pipes. In the case of a large pipe, each adjacent pipe outer surface abutting portion can be in a state of being directed to the outer peripheral surface of the pipe, so that there is an advantage that marking can be performed stably.

(A), (b) is a perspective view seen from the front side and back side of the marking member M ₁ of the first embodiment of the present invention, respectively. (A) is a plan view of a marking device M _1, (b) is a sectional view taken along line X-X of (a). It is a cross-sectional view of a state where the marking member M ₁ is an assigned [Y ₁ -Y ₁ line enlarged sectional view of FIGS. 2 (a)] with respect to the pipe P (50). Using a marking member M _1, it is a plan view showing a state of marking the connection margin end of the outer peripheral surface of the pipe P (50). It is a cross-sectional view of a state where the marking member M ₁ is an assigned [Y ₁ -Y ₁ line enlarged sectional view of FIGS. 2 (a)] to the tube P (30). Different pipe P of DN (13), P (50) , a cross-sectional view showing a comparison of the state where the marking member M ₁ is an assigned relative P (0.99). (A), (b) is a perspective view, and an enlarged side view of the marking device M ₂ of Reference Example 1 from the back side. (A) is a rear view of the marking member M ₃ of Reference Example 2, (b), the Y ₃ -Y ₃ line enlarged cross-sectional view of (a), (c) is a perspective view of the back side of the marking member M ₃ FIG. Using a marking member M _3, it is a plan view showing a state of marking the connection margin end of the outer peripheral surface of the pipe P (50). (A), (b) is a rear view and a side view of the marking member M _4, respectively Example 3. (A), a rear view and a side view of (b) is the marking member M ₅ each Reference Example 4. (A), (b) is a rear view and a side view of the marking member M _6, respectively Example 5. (A), (b), (c) is a rear view of the marking member M ₇ each Reference Example 6, a perspective view of a side view and back side. (A), (b) is a rear view and a side view of the marking member M ₈ each Reference Example 7. (A), (b) is a rear view and a side view of the marking device M ₉ of each Reference Example 8.

Hereinafter , the present invention will be described in more detail with reference to examples. In order to avoid complication of the drawings, regarding the illustration of the tube, only the perspective view and the broken view show the inner circumference circle whose thickness can be recognized, and in the drawings other than the perspective view and the broken view, the outer circumference is shown. Only the circle is shown, and the inner circle is not shown.

A marking member M _{1 according} to Embodiment 1 of the present invention is shown in FIGS. The marking member M ₁ is a member for determining the position (connection margin end) of the connection margin end portion of various types of pipes P having different diameters and marking the position. Marking element M ₁ is formed by a resin, the short plate-shaped marking member body D _1, in order to lock the said marking member body D ₁ on the end surface of the pipe P, in the longitudinal direction of the marking device body D ₁ It is formed over the entire length in the longitudinal direction at a predetermined interval in the width direction on the tube end locking end E ₁ projecting from the back surface 11 at the end and on the back surface side of the marking member body D _1. A total of three tube outer surface contact protrusions T ₁ a, T ₁ b, and T ₁ c are provided. A total of three tube outer surface abutting ridges T ₁ a, T ₁ b, T ₁ c have a pipe end locking end E ₁ locked to the end surface of the pipe P, and a marking member for the pipe P In a state where M ₁ is addressed, one or two adjacent ones can contact at a plurality of positions shifted along the circumferential direction on the outer peripheral surface of the pipe P. The pipe outer surface abutting ridges T ₁ a and T ₁ c are used for the drain pipe, and the pipe outer surface abutting ridges T ₁ b and T ₁ c are used for the water supply pipe. The pipe P is composed of a water supply PVC pipe (HI / TS), and there are a water supply pipe and a drain pipe depending on the application, and the marking member M ₁ specifies the connection margin of both the water supply pipe and the drain pipe. Marking is possible. Note that the symbol (P) generally indicates a pipe. When the pipe diameter is specified and the pipe is displayed, the pipe diameter is used together. For example, a pipe with a nominal diameter (50) is displayed as P (50).

Out of the total three pipe outer surface abutting ridges T ₁ a, T ₁ b, T ₁ c, two of the pipe outer surface abutting ridges T ₁ a, T ₁ b are in the width direction of the marking member body D ₁ . The remaining one tube outer surface abutting protrusion T ₁ c is formed at both ends, and is formed at the center in the width direction of the marking member body D ₁ . The outer surfaces of the two tube outer surface abutting protrusions T ₁ a and T ₁ b ₁ at both ends are flush with the side surface of the marking member body D ₁ . The protruding heights (Ht) of the tube outer surface abutting protrusions T ₁ a, T ₁ b, and T ₁ c (see FIG. 3) are such that the tube end locking end E ₁ can be locked to the end surface of the tube. Furthermore, it is much lower (smaller) than the projecting height (He) of the tube end locking end E ₁ . The pipe outer surface abutting ridges T ₁ a and T ₁ c are used for the drain pipe, and the pipe outer surface abutting ridges T ₁ b and T ₁ c are used for the water supply pipe. Both ends of the marking member body D ₁ in the width direction on the surface 12 side are pressed by the fingertip of one hand of the operator in a state where the marking member M ₁ is applied to the pipe P. It is formed on an inclined surface 13 that gradually approaches the outer peripheral surface of P. In other words, both end portions in the width direction of the marking member body D ₁ can be said to have been formed in the "large chamfered shape" at the surface side.

_On the surface 12 of the marking member body D1, there are marking position indicators As and Ae for displaying the positions of the connection margins relative to the nominal diameters of both the water supply pipe and the drain pipe, that is, the marking positions with respect to the outer peripheral surface of the pipe. Is formed. If the call diameter are the same, the drain pipe, in comparison to a short pipe joint is used for the water supply pipe, the marking position are different with respect to the tube of the same call diameter, the surface of the marking member body D ₁ Marking position indicator portions As and Ae of the water supply pipe and the drain pipe are independently formed in each portion obtained by dividing the portion 12 into two along the width direction. A boundary line 14 is formed at the boundary between the surface 12 of the marking member main body D ₁ and each inclined surface 13 at both end portions in the width direction, and the marking position indicator portions As and Ae intersect the boundary line 14. It is formed by a short line segment 15a or a bent line segment 15b and a numerical value of the nominal diameter displayed inside each of the line segments 15a and 15b. The numbers indicating the line segments 15a and 15b and the nominal diameter are all displayed by convex markings, and the convex markings mark the marking member body D1 on the outer peripheral surface of the pipe P with _one hand of the operator. It becomes resistance to the fingertip when pressing, and the fingertip becomes difficult to slip. Therefore, the presence of convex stamping, without slipping marking member M ₁ with respect to the tube P, can be advantageously firmly held. Further, the markings of the marking position index portions As and Ae can be made concave instead of convex. In FIGS. 1 and 2, 16, when kept hanging on the waist of the operator marking member M ₁ by straps such shows a through-hole through which the string class.

Then, using the marking member M ₁ described above, the connection margin of the pipe P (50) having the nominal diameter (50) for drainage is marked as follows. That is, as shown in FIGS. 1 and 3, the pipe end locking portion E ₁ of the marking member M ₁ is locked to the end surface Pa of the pipe P (50), and the back surface 11 side of the marking member main body D _1. The tube outer surface abutting protrusion T ₁ a projecting from one end in the width direction of the tube is brought into contact with the outer peripheral surface of the tube P (50). Thus, the marking device body D ₁ with respect to the outer peripheral surface of the pipe P (50) is tube outer surface and the abutting protrusion T ₁ a described above, another tube adjacent to the tube outer surface abutting protrusion T ₁ a It abuts at each part of the outer surface abutting protrusion T ₁ c. That is, the marking member main body D ₁ contacts the outer peripheral surface of the pipe P (50) at two contact points Q ₁₁ and Q ₁₂ that are shifted in the circumferential direction in a cross-sectional view. As described above, when the pipe end locking portion E ₁ of the marking member M ₁ is locked to the end surface Pa of the pipe P (50), the marking member body D ₁ is brought into contact with the outer peripheral surface of the pipe P (50). The marking member main body D ₁ is in contact with two contact points Q ₁₁ and Q ₁₂ that are displaced along the circumferential direction on the outer peripheral surface of the pipe P (50), and the contact points Q ₁₁ and Q ₁₂ are since along the tube axis direction continuously exists by the length of the marking member body D _1, as in the conventional marking member, as compared with the case that abuts only one point in the circumferential direction, the pipe P ( stability of holding the marking member M ₁ for 50) is increased dramatically.

Therefore, as shown in FIG. 4, the marking member M ₁ is applied to the outer peripheral surface of the pipe P (50) as described above, and the pipe P (50) is attached to the pipe P (50) by one hand of the operator. In the state where the marking member M ₁ is firmly held, particularly in the state where the inclined surface 13 is pressed with the fingertip of one hand, the pen tip of the marking pen B is used as the nominal diameter (50) of the marking position indicator portion As for the drain pipe. The marking line K is applied along the circumferential direction to the outer peripheral surface of the pipe P (50) with the pen tip. Because of the high stability of holding the marking member M ₁ for the pipe P (50), at the time of marking, without the pipe P (50) is skidding, marking lines to the normal position of the outer peripheral surface of the pipe P (50) K can be displayed accurately. During marking, to the portion of the marking device body D ₁ of the inclined surface 13, because it is stamped to the line segment 15a or described bending line 15b constituting the marking position indicator unit As (Ae), the pipe P (50) The marking position corresponding to the call diameter can be searched without error.

FIG. 5 is a cross-sectional view of a state in which the marking member M ₁ is addressed to the pipe P (30) having the nominal diameter (30), and the outer diameter is larger than that of the pipe P (50). In order to reduce the size, the marking member main body D ₁ is in contact with the outer peripheral surface of the pipe P (30), and the pipe outer surface abutting protrusion T ₁ a and two adjacent pipe outer surface on the back surface 11 of the marking member main body D _1. They abut at the two abutment points Q ₁₁ and Q ₁₃ in a cross-sectional view shifted along the circumferential direction with the intermediate point of the contact protrusions T ₁ a and T ₁ c. Therefore, the stability of the “addressed state” of the marking member M ₁ with respect to the pipe P (30) is enhanced.

When considering both the water supply pipe and drain pipe as the pipe P, as shown in FIG. 6, the large pipe P of DN, adjacent formed on the back surface 11 of the marking device body D ₁ to 2 Two pipe outer surface abutting protrusions T ₁ a, T ₁ c (T ₁ b, T ₁ c) are marked on the pipe P at two points shifted in the circumferential direction of the outer peripheral surface of the pipe P in a cross-sectional view. member M ₁ abuts. On the other hand, the small tube P of DN, and the marking member body tube outer surface formed on an end portion in the width direction of D ₁ of the rear surface 11 abutting protrusion _{T 1 a (T 1 c)} , of the marking device body D ₁ The intermediate point of two adjacent tube outer surface contact protrusions T ₁ a and T ₁ c (T ₁ b and T ₁ c) on the back surface 11 is shifted in the circumferential direction of the outer peripheral surface of the tube P in a cross-sectional view. At two points, the marking member M ₁ comes into contact with the pipe P. In any case, the stability of the “addressed state” of the marking member M ₁ with respect to the pipe P is enhanced.

In the case of marking against the water supply pipe, each tube outer surface abutting protrusion T ₁ b of the marking member M _1, T ₁ c and the tube outer surface abutting protrusion T ₁ b on the back surface 11, T ₁ c This is performed in the same manner as in the case of the drain pipe described above using two portions selected from a total of three portions of the plane portion between the two.

( Reference Example 1 )
Next, the marking member M ₂ of Reference Example 1 will be described with reference to FIG. The marking member M ₂ has a pipe end locking portion E _{2 that} is locked to the end surface of the pipe P at one end portion in the longitudinal direction of the marking member body D ₂ having a short curved plate with a circular cross section. It is the structure projected toward the side. The radius of curvature R of the marking member body D ₂ of the back surface 21 where the arc surface shape, they become smaller than half the outer diameter of the tube of the minimum call radial width direction of both edges of the rear surface 21 is a marking object The tube outer surface contact portions T ₂ a and T ₂ b contact linearly at two locations shifted in the circumferential direction on the outer peripheral surface of all the tubes P. _On the surface 22 of the marking member main body D2, a marking position indicator (not shown) for indicating the marking position of another type of pipe having a different diameter is provided. Marking element M ₂ are without separately providing a tube outer surface abutting portion to the marking member body D _2, only by the cross-sectional shape of the marking device body D _2, there is an advantage capable of forming a tube outer surface abutting portion. Incidentally, in FIG. 7 (b), C indicates the center of the arcuate surface of the marking member body D ₂ of the rear surface 21.

Therefore, different to the end surface Pa of all of the pipe P is engaged with the tube end engaging portion E ₂ of the marking member M ₂ of DN, the supply with a marking member M ₂ with respect to the pipe P, the marking member The tube outer surface abutting portions T ₂ a and T ₂ b formed at both edges in the width direction of the back surface 21 of M ₂ are shifted in the width direction on the outer peripheral surfaces of all the tubes P having different nominal diameters. Abut. For this reason, the “addressing state” of the marking member M ₂ with respect to the pipe P is stabilized, and the marking operation can be accurately performed in a stable state.

In the marking member M ₂ , the cross-sectional shape of the back surface 21 of the marking member main body D ₂ does not have to be an arc shape, and may be a general arc shape (curved surface shape). Only the back surface 21 of the marking member main body D ₂ needs to be formed in an arc shape, and the front surface 22 does not need to be arc-shaped.

( Reference Example 2 )
Next, with reference to FIGS. 8 and 9, it will be described marking member M ₃ of Reference Example 2. Marking member M ₃ are, short plate-shaped marking member body D ₃ in the longitudinal direction of the one end tube end engaging portion E ₃ to is protruded toward the side of the back surface 31, the rear surface 31 of the marking member body D ₃ In the central portion in the width direction, a concave section 1 having a large cross-sectional ratio is formed along the longitudinal direction (in the state where the marking member M ₃ is directed to the tube P, the tube axis direction). A large number of through holes G _{1 to} G ₅ for marking position display are formed along the width direction of the marking member main body D ₃ so as to intersect the concave portion 1. The through hole G ₃ has an irregular shape in which two squares are continuously shifted from each other. The overall shape of each through-hole G ₁ ~G ₅ is a large square shape of slenderness ratio, each end edge facing in the longitudinal direction of the marking member body D ₃ in each through-hole G ₁ ~G ₅ is Marking position indicator (A ₃₁ a, A ₃₁ b, A ₃₂ a, A ₃₂ b, A ₃₃ a, A ₃₃ b, A ₃₃ a ', A ₃₃ b', A ₃₄ a, A ₃₄ b, A ₃₅ a , A ₃₅ b).

For this reason, when the pipe end locking portion E ₃ is locked to the end surface of the pipe P and the marking member M ₃ is placed on the pipe P, each end edge in the width direction of the concave portion 1 is the outer periphery of the pipe P. The marking member M ₃ is stably held with respect to the pipe P in contact with the two places shifted in the circumferential direction of the surface. In this respect, each edge in the width direction of the concave portion 1 functions as a tube outer surface contact portion T ₃ a, T ₃ b. The depth (F) of the concave portion 1 (see FIG. 8B) is determined so that the outer periphery of the smallest diameter tube does not abut against the bottom surface of the concave portion 1 among the corresponding other types of nominal diameter tubes. When the outer circumference of the smallest diameter tube contacts the bottom surface, there is no problem as long as it is in contact with the tube outer surface contact portions T ₃ a and T ₃ b at the same time. In other words, there is no problem as long as the outer periphery of the tube is simultaneously in contact with the three points of the bottom surface of the recess 1 and the tube outer surface contact portions T ₃ a and T ₃ b.

As shown in FIG. 9, in the state where the marking member M ₃ is addressed to the pipe P, through holes G ₁ to G are marked with marking position index portions corresponding to the nominal diameter of the pipe P. A marking line K is applied to the outer peripheral surface of the pipe P by moving the pen tip of the marking pen B along one of the opposing edges of G ₅ .

( Reference Example 3 )
Next, the marking member M ₄ of Reference Example 3 will be described with reference to FIG. Marking element M ₄ is marking member body D ₃ by forming recesses 1 in the longitudinal direction, the both edges in the width direction outside the tube surface abutment T ₃ a, T ₃ b and the reference example 2 In the marking member M ₃ , in place of the concave portion 1, a pair of square tubes having a cross-section opposed to each other in the width direction at a portion farthest from the tube end locking portion E ₄ on the back surface of the marking member main body D _4. The outer surface abutting member 2 is provided integrally, and the opposite corner edges inside the pair of tube outer surface abutting members 2 are the tube outer surface abutting portions T ₄ a and T ₄ b. The height (J) of the pair of tube outer surface contact members 2 is preferably such that the tube does not contact the back surface 41 of the marking member body D ₄ in a state where the tube having the smallest nominal diameter is addressed. However, on the condition that the outer circumference of the tube having the smallest nominal diameter simultaneously abuts a total of three points of the tube outer surface abutting portions T ₄ a and T ₄ b and the back surface 41 of the marking member body D ₄ , the smallest The outer circumference of the tube having the nominal diameter may abut against the back surface 41.

With regard to the marking position indicator unit, it is similar to the marking member M ₃ of Reference Example 2, a number of through-holes G ₁ ~G ₅ is formed in the marking member body D _4, the respective through-holes G ₁ ~ each edge facing in the longitudinal direction of the marking member body D ₄ in G ₅ constitute a marking position indicator unit. Further, the surface 42 of the marking member body D ₄ are numbers DN corresponding to the marking position indicator unit is displayed.

( Reference Example 4 )
Next, the marking member M ₅ of Reference Example 4 will be described with reference to FIG. The marking member M ₅ has a very gentle cross section at the center in the width direction of the back surface 51 of the marking member main body D ₅ instead of the pair of pipe outer surface contact members 2 in the marking member M ₄ of Reference Example 3. A pair of tube outer surface contact surfaces T ₅ a and T ₅ b having a letter shape are formed, and the remaining configuration is the same as the marking member M ₄ of Reference Example 3 . The pipe P (40), P (150 ) , each tube outer surface abutting surface T ₅ a, respectively, T ₅ contact points are two points on the _{b Q 51 a, Q 51 b} (Q 52 a, Q 52 b) Abut. That is, according to the marking member M ₅ , the back surface of the marking member main body D _{5 with} respect to the outer surface of the pipe (P) is located at the pipe axis at two locations shifted in the circumferential direction in all the nominal diameter pipes (P). since contact continuously linearly along the direction, the stability of the holding of the marking member M ₅ for the outer surface of the pipe (P) is increased even more. In FIG. 11, 52 indicates the surface of the marking member body D _5, the numbers of DN is displayed.

In the marking device M ₅ of Reference Example 4, in the small tube of DN (size), in contact with a gentle V-shaped outer tube circumference contact surface T ₅ a that is, the T ₅ b, the contact point Q ₅₂ a , Q ₅₂ b varies with the nominal diameter of the tube. However, in the case of a large-sized pipe exceeding a specific nominal diameter, it is connected to the pipe outer peripheral contact surfaces T ₅ a and T ₅ b having a gentle V shape and the pipe outer peripheral contact surfaces T ₅ a and T ₅ b. It is characterized in that it always abuts against the abutting points Q ₅₂ a and Q ₅₂ b in the cross-sectional view, which is an edge portion intersecting with the flat surface (plane) to be touched, and the abutting point does not change.

( Reference Example 5 )
Next, the marking member M ₆ of Reference Example 5 will be described with reference to FIG. In the marking member M ₄ of Reference Example 3 , the marking member M ₆ is a marking position index indicating each pipe end edge facing along the longitudinal direction of the marking member body D ₄ in a large number of rectangular through holes G _{1 to} G ₅ . Instead of the configuration of the marking member, a large number of slit-shaped through holes formed along the width direction of the marking member main body D ₆ are used as marking position index holes A ₆ . In FIG. 12, 61 and 62 indicate the back and front surfaces of the marking member body D ₆ , respectively.

( Reference Example 6 )
Next, referring to FIG. 13, described the marking member M ₇ of Reference Example 6. In the marking member M ₇ , a pipe end locking portion E ₇ projects from one end of the short flat plate-shaped marking member main body D _{7 in} the longitudinal direction toward the back surface 71, and the back surface 71 of the marking member main body D ₇ . a close end opposite the pipe end locking portion E ₇ along the longitudinal direction of, yet at one end along the width direction, in contact with the outer peripheral surface of the pipe P hemispherical tube outer surface equivalent The contact protrusion T ₇ is provided. On the surface 72 of the marking member body D ₇ is the marking position indicator unit is displayed.

For this reason, when the pipe end locking portion E ₇ is locked to the end surface of the pipe P and the marking member M ₇ is directed to the pipe P, the marking member body D ₇ has a hemispherical pipe outer surface in a cross-sectional view. The contact point Q ₇₁ of the contact protrusion T ₇ and the contact point Q ₇₂ of the back surface 71 of the marking member body D ₇ are in contact with the outer peripheral surface of the pipe P at two points shifted in the circumferential direction of the outer peripheral surface of the pipe P. . Contact point Q ₇₁ relative to the tube outer surface abutment projection T ₇ hemispherical is a point-like, contact point Q ₇₂ relative to the rear surface of the marking member body D ₇ is a linear. Thus, the marking device body D ₇ to the outer peripheral surface of the pipe P is, in cross-section view, in order to abut at two positions shifted in the circumferential direction of the outer peripheral surface of the pipe P, the marking member M ₇ against the pipe P The “addressed state” is stabilized.

( Reference Example 7 )
Marking element M ₈ of Reference Example 7 shown in FIG. 14, with respect to the marking member M ₇ of Reference Example 6, a predetermined interval a plurality of tube outer surface abutment projection T ₈ is along the longitudinal direction of the marking member body D ₈ Only the configuration provided is different. According to the marking member M ₈ , the marking member main body D ₈ is linear at two contact points Q ₈₁ and Q ₈₂ that are displaced along the circumferential direction of the outer peripheral surface of the pipe P with respect to the outer peripheral surface of the pipe P. Or, since it abuts in a broken line shape, the above-mentioned “addressing state” is further stabilized. Regarding the other configurations of the marking member M _8, the portions corresponding to the marking member M _7, performed only indicated by a reference only different signs "subscript". In FIG. 14, 82 indicates the surface of the marking member body D _8.

( Reference Example 8 )
The marking member M ₉ of Reference Example 8 shown in FIG. 15 has a configuration in which a plurality of pipe outer surface abutting protrusions T ₈ are continuously formed as a pipe outer surface abutting protrusion T ₉ in the marking member M ₈ of Reference Example 7. Only different. The marking member main body D ₉ abuts linearly on the outer peripheral surface of the pipe P at two contact points Q ₉₁ and Q ₉₂ that are displaced along the circumferential direction of the outer peripheral surface of the pipe P. Regarding the other configurations of the marking member M _9, the portions corresponding to the marking member M _8, performed only indicated by a reference only different signs "subscript". In FIG. 15, 91 and 92, showing the back surface and the surface of the marking member body D _9.

_{Ae, As, A 31 a,} A 31 b, A 32 a, A 32 b, A 33 a, A 33 b, A 33 a ', A 33 b', A 34 a, A 34 b, A 35 a, A ₃₅ b: Marking position indicator
A ₆ : Marking position index hole (marking position index section)
D ₁ to D _9: Marking member body
E _{1 to} E ₉ : Pipe end locking part
M ₁ ~M _9: marking member
P: Tube
Pa: pipe end face Q ₁₁ , Q ₁₂ , Q ₁₃ , Q ₅₁ a, Q ₅₁ b, Q ₅₂ a, Q ₅₂ b Q ₇₁ , Q ₇₂ , Q ₈₁ , Q ₈₂ , Q ₉₁ , Q ₉₂ : in cross-sectional view Contact point of the marking member body against the pipe
T ₁ a, T ₁ b, T ₁ c, T ₉ : Tube outer surface abutting protrusion (tube outer surface abutting portion)
T ₂ a, T ₂ b, T ₃ a, T ₃ b, T ₄ a, T ₄ b: tube outer surface contact portion
T ₅ a, T ₅ b: Tube outer surface contact surface (tube outer surface contact portion)
T ₇ , T ₈ : Tube outer surface contact protrusion (tube outer surface contact portion)
T ₉ : Tube outer surface contact protrusion (tube outer surface contact portion)
11, 21, 31, 41, 51, 61, 71, 81, 91: Back surface of the marking member body
13: Inclined surface on the front side of the marking member body

Claims (2)

A marking member for determining the length of the connection allowance for the pipe joint of the pipe and marking the connection allowance on the outer peripheral surface of the pipe,
The connection allowance of at least two types of pipes having different diameters, and a short plate-shaped marking member main body, a pipe end locking portion projecting on the back side of the marking member main body to be locked to the end surface of the pipe A marking position indicator for indicating a position for marking the end,
On the back surface of the marking member main body, a plurality of tube outer surface contact portions that protrude from the tube end of the tube in the tube axis direction and contact with two outer peripheral surfaces that are displaced along the circumferential direction of the tube protrude. Formed in a state,
The marking position indicator portion and one tube outer surface contact portion among the plurality of tube outer surface contact portions are formed at an end portion on the same side in the width direction of the marking member body ,
In a state where the tube end locking portion is locked to the end surface of the tube having a relatively large nominal diameter, a tube outer surface abutting portion formed at the end on the same side as the marking position indicator portion, and the tube outer surface The abutment portion and another tube outer surface abutment portion adjacent to the abutment portion are configured to abut on two locations displaced along the circumferential direction of the outer peripheral surface of the tube,
In a state where the tube end locking portion is locked to the end surface of a tube having a relatively small nominal diameter, a tube outer surface abutting portion formed at the end on the same side as the marking position indicator portion, and the tube outer surface A plane specific contact portion on the back surface of the marking member body existing between the contact portion and another adjacent tube outer surface contact portion is displaced along the circumferential direction of the outer peripheral surface of the tube. A marking member characterized in that the marking member is configured to come into contact with a portion . The marking member according to claim 1 , wherein the tube outer surface contact portion is formed on a protrusion extending along the tube axis direction.

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