Marking device

Abstract

To provide a marking device that can make a marking on an arbitrary position of a columnar member, accurately with good operability.SOLUTION: A marking device is provided with a main body 10 comprising a through-hole 13, a plurality of marking members 30 stored inside the main body 10 to sandwich the through-hole 13, and an operating part that moves the plurality of marking members 30 toward a center of the through-hole 13. The marking members 30 may be openable / closable types and also movable types, which can make a marking on a surface of a columnar member inserted through the through-hole 13.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a marking device used to apply markings to the outer surface of a columnar or cylindrical member (hereinafter referred to as a columnar member). [Background technology]

[0002] When installing cylindrical components such as metal pipes or plastic pipes, circumferential markings are often applied to the outer surface of the cylindrical components to clearly indicate fixing positions, joining points, etc. Although such markings can be done by hand, because the marking is done on a curved surface, mistakes are more likely to occur than when marking on a flat surface, and accuracy is also difficult to achieve.

[0003] Patent Document 1 proposes a device that can accurately mark the outer circumference of a pipe by attaching a marker pen to a pipe holder with a group of arc-shaped grooves into which the end of the pipe is inserted and rotating the pipe along the group of arc-shaped grooves. However, this device has problems such as a complex structure, being expensive, and requiring time for preparation, resulting in poor work efficiency. Another problem is that this device can only mark near the end of the pipe. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-152513 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a marking device that can mark any position on the outer surface of a cylindrical member accurately and with good operability. [Means for solving the problem]

[0006] The marking device of the present invention, which has been made to solve the above problems, is characterized by comprising a main body having a through hole, a plurality of marking members stored inside the main body so as to sandwich the through hole, and an operating unit that moves the plurality of marking members toward the center of the through hole.

[0007] It is preferable that the structure is provided with an elastic body that biases the operating part in a direction in which the plurality of marking members are housed in the outer periphery of the through hole. Also, the plurality of marking members may be axially supported inside the main body and provided with a printing body on the inner periphery thereof.

[0008] The operation unit may be configured to include a disk-shaped operation plate housed inside the main body, the plurality of marking members having obliquely extending slots toward the outer periphery, the operation plate having a plurality of protrusions that engage with the respective slots of the marking members, and the plurality of marking members can be simultaneously swung by rotating the operation plate.Furthermore, the operation unit may be configured to include a plurality of protrusions on both the front and back surfaces of the operation plate, and the plurality of marking members can be disposed on both the front and back surfaces of the operation plate.

[0009] Furthermore, the plurality of marking members may be movably supported inside the main body and have a deformable printing body inside. [Effects of the Invention]

[0010] The marking device of the present invention can mark the outer surface of a cylindrical member by inserting the cylindrical member into the through-hole of the main body and operating the operating unit to swing the marking member toward the center of the through-hole. This allows for quick and accurate marking of any position on the cylindrical member. The marking device of the present invention is also lightweight and easy to carry. Furthermore, if an elastic body is provided to bias the operating unit, it can be operated with a single touch, thereby improving work efficiency. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an overall perspective view showing a state in which a marking device according to an embodiment is used; [Figure 2] FIG. 1 is a front view and a cross-sectional view of the front circular case. [Figure 3] This is a front view and a cross-sectional view of the rear circular case. [Figure 4] 3A and 3B are a front view and a side view of the operation unit. [Figure 5] FIG. [Figure 6] FIG. 2 is a front view showing the internal structure of the marking member in an open state. [Figure 7] FIG. 2 is a front view showing the internal structure of the marking member in a closed state. [Figure 8] FIG. 10 is a perspective view showing a state in which markings are made on a columnar member. [Figure 9] FIG. 10 is a front view showing another embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing the marking member of the second embodiment in an open state. [Figure 11] FIG. 10 is a cross-sectional view showing a marking member of a second embodiment in a closed state. [Figure 12] FIG. 10 is a cross-sectional view showing a marking member of a third embodiment in a closed state. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described below. 1 is an overall perspective view showing the use state of the marking device of the first embodiment. As will be described in detail below, the marking device of this embodiment is provided with six marking members that can be opened and closed.

[0013] As shown in Fig. 1, the marking device of this embodiment has front and back circular cases 11 and 12 that make up a disk-shaped main body 10. As shown in Fig. 2, the front circular case 11 has a circular through-hole 13 in the center and an annular rib 14 on the outer periphery. A notch 15 is provided on the inner end face of the annular rib 14 over a range of approximately 45°. Furthermore, three cylindrical protrusions 16 are provided at 120° intervals on the inner surface of the circular case 11 near the through-hole 13.

[0014] The rear circular case 12 has an inverted shape of the front circular case 11, as shown in Figure 3. Three cylindrical protrusions 17 are also provided on the inner surface of the rear circular case 12 at 120° intervals, but they are located midway between the three cylindrical protrusions 16 on the front circular case 11, i.e., at positions offset by approximately 60°.

[0015] The operation unit shown in Fig. 4 is housed inside the main body 10, which is made up of the front and back circular cases 11, 12 joined together. This operation unit consists of a disk-shaped operation plate 20, and the outer diameter of the operation plate 20 corresponds to the inner diameter of the annular rib 14 of the circular cases 11, 12, so it is housed without any rattle. In addition, an operation end 21 is provided on the outer periphery of the operation plate 20, and as shown in Fig. 1, this operation end 21 protrudes to the outside through a notch 15 in the main body 10. Therefore, by operating the operation end 21 with a fingertip, the disk-shaped operation plate 20 can be rotated within a range of approximately 45° inside the main body 10. The operation plate 20 also has a through-hole 22 formed therein, the through-hole 22 having the same diameter as the through-hole 13 in the main body 10.

[0016] 4 and 5, three protrusions 23 and three protrusions 24 are provided on both the front and back surfaces of the disk-shaped operation plate 20. The protrusions 23 are arranged at 120° intervals, and the protrusions 24 are also arranged at 120° intervals.

[0017] As shown in Figure 6, a plurality of marking members 30 are stored inside the main body 10. Each marking member 30 has the same shape, with an inner peripheral surface 31 and an outer peripheral surface 32 that are arc-shaped, and a tip surface 33 that is inclined toward the inner peripheral surface 31. An axial hole 34 is formed in the base. In addition, an elongated hole 35 is formed that extends obliquely from the vicinity of the axial hole 34 toward the outer peripheral surface 32.

[0018] In this embodiment, three marking members 30 are arranged on the front side of the disc-shaped operation plate 20, and three marking members 30 are arranged on the back side, for a total of six marking members 30 stored inside the main body 10. However, the number of marking members 30 is not limited to six. A printing body 36 is arranged on the concave arc-shaped inner peripheral surface 31 of the marking member 30. The printing body 36 may be, for example, a porous body impregnated with marking ink, but is not limited to this.

[0019] As shown in Fig. 6, the axial holes 34 of each marking member 30 are fitted into the cylindrical protrusions of the circular cases 11 and 12, and the protrusions 23 of the operation plate 20 are fitted into the long holes 35 of each marking member 30. Fig. 6 does not show the front circular case 11 in order to show the internal structure, and the cylindrical protrusions 16 of the circular case 11 are inserted into the axial holes 34 from the front side of the page. Also, Fig. 6 shows three marking members 30 on the front side of the operation plate 20, but three marking members 30 are similarly arranged on the back side of the operation plate 20, and only some of these are shown in Fig. 6.

[0020] 6 shows a state in which the operating element 21 is at the left end of the notch 15, and the protrusion 23 of the operating plate 20 is at the left end of the elongated hole 35 of each marking member 30, i.e., in a position close to the axial hole 34. In this state, each marking member 30 has swung outward to an open position, and the printing body 36 of each marking member 30 is in approximately the same position as the central through-holes 13, 22. However, when the operating element 21 is operated to rotate the operating plate 20 until the protrusion 23 reaches the right end of the notch 15, each marking member 30 will swung about the axial hole 34 and move inward into the through-holes 13, 22, as shown in FIG.

[0021] To use the marking device of the present invention, each marking member 30 is opened as shown in Figure 6 and inserted into the columnar member 50 to the desired marking position as shown in Figure 1. Next, by operating the operating end 21 to the state shown in Figure 7, each marking member 30 swings toward the inside of the through-holes 13, 22, and the printing body 36 comes into close contact with the surface of the columnar member 50, making it possible to apply the marking 51 as shown in Figure 8.

[0022] In this embodiment, marking members 30 are arranged on both the front and back of the operation plate 20, resulting in two rows of markings 51 as shown in Figure 8, but if the marking members 30 are arranged on only one side, it is possible to make the markings 51 in a single row. After that, the operation end 21 is returned to the open state of each marking member 30 as shown in Figure 6, and the marking members 30 can be removed from the cylindrical member 50.

[0023] In the above-described embodiment, the marking member 30 is opened and closed by manually moving the operating element 21, but as shown in Figure 9, an elastic body 40 can be provided on the outside or inside of the main body 10, which urges the operating plate 20 in a direction in which the marking member 30 is housed in the outer periphery of the through-holes 13, 22, i.e., in the opening direction. If such an elastic body 40 is provided, the operating element 21 only needs to be operated when marking is to be performed, and when the operating element 21 is released, the force of the elastic body 40 causes the marking member 30 to return to the open state, allowing one-touch operation and dramatically improving the efficiency of the marking work.

[0024] The second embodiment shown in FIGS. 10 and 11 will be described below. In this embodiment, a substantially rectangular through-hole 61 is formed in the center of a main body 60 having a substantially rectangular cross section. Marking members 62 are housed on both sides of the interior of the main body 60. The marking member 62 consists of a support portion 63 that penetrates the side walls on both sides of the main body 60 and a deformable printing body 64 provided at the tip of the support portion 63. The printing body 64 can be a deformable porous body impregnated with marking ink, but is not limited to this. For example, a cavity can be formed in the support portion 63, and a structure can be created in which the flat printing surface can easily deform along the surface of a cylindrical member.

[0025] The support part 63 is movable inside the main body 60 in directions toward the center of the through-hole 61 and away from the through-hole 61, and in this embodiment, an elastic body 66 is provided between an outer end 65 of the support part 63 and the outer wall of the main body 60. Therefore, when no external force is applied, the marking member 62 is stored on the outer periphery of the through-hole 61 of the main body 60.

[0026] The outer end 65 of the support part 63 of the marking member 62 functions as an operating part, and when the columnar member 50 is inserted into the through-hole 61 and the outer end 65 is pushed inward as shown in Figure 11, the marking member 62 moves toward the center of the through-hole 61, and the deformable printing body 64 inside it presses against both sides of the columnar member 50, thereby applying a mark. After that, when the hand is released, the force of the elastic body 66 causes the marking member 62 to return to the position shown in Figure 10.

[0027] As shown in this second embodiment, the marking device of the present invention is not limited to an openable / closable type, but may be a movable type. In the second embodiment, a pair of marking members 62 are provided on the left and right, but it is also possible to provide marking members 62 on the top and bottom in the same manner.

[0028] A third embodiment is shown in Figure 12. The main body of the second embodiment described above was an integrated unit that could not be separated, so if the end of the columnar member 50 had a portion with a larger diameter than the through-hole 61, the columnar member 50 could not be inserted into the through-hole 61. However, in the third embodiment, the main body 70 has a separable structure, so even if the end of the columnar member 50 has a portion with a larger diameter than the through-hole 61, it is possible to fit the main body 70 into any desired location and perform marking.

[0029] As described above, the marking device of the present invention is lightweight, easy to carry, and inexpensive to manufacture. By using the marking device of the present invention, marking can be performed accurately and with good operability at any position on the columnar member 50. [Explanation of symbols]

[0030] 10 Main body (first embodiment) 11 Front circular case 12 Circular case back 13 Through hole 14 Annular rib 15 Notch 16 Cylindrical protrusion 17 Cylindrical protrusion 20 Operation plate 21 Control end 22 Through hole 23 Protrusion 24 protrusions 30 Marking material 31 Inner surface 32 Outer surface 33 Tip surface 34 Shaft hole 35 long hole 36 Printed Font 40 Elastic Body 50 Cylindrical member 51 Marking 60 Main body (second embodiment) 61 Through hole 62 Marking material 63 Support part 64 print typeface 65 Outer end 66 Elastic Body 70 Main body (third embodiment)

Claims

1. A marking device comprising: a main body having a through hole; a plurality of marking members stored inside the main body so as to sandwich the through hole; and an operating unit that moves the plurality of marking members toward the center of the through hole.

2. 2. The marking device according to claim 1, further comprising an elastic body that biases the operating portion in a direction in which the plurality of marking members are housed in the outer periphery of the through hole.

3. 3. The marking device according to claim 1, wherein the plurality of marking members are journaled inside the main body and have a printing body on the inner peripheral surface thereof.

4. 3. The marking device according to claim 1 or 2, wherein the operating unit comprises a disk-shaped operating plate housed inside the main body, the plurality of marking members each having a long hole extending diagonally toward the outer periphery, the operating plate having a plurality of protrusions that engage with each long hole of each marking member, and the plurality of marking members can be swung simultaneously by rotating the operating plate.

5. 5. The marking device according to claim 4, wherein the operation portion comprises a plurality of protrusions on both the front and rear surfaces of the operation plate, and the plurality of marking members are disposed on both the front and rear surfaces of the operation plate.

6. 3. The marking device according to claim 1, wherein the plurality of marking members are movably supported inside the main body and have deformable printing bodies therein.

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