JP2014065168A - Outer circumferential face printing method for cylindrical metallic body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer circumferential printing method for a cylindrical metallic body in which, even if equipment is newly provided, equipment cost is low, and further, printing speed is high as well.SOLUTION: A sleeve 1 is almost horizontally fixed, a pad part 10 fitted with ink is lowered from the upper part of the sleeve 1 body to press the outer circumferential face of the sleeve 1, printing is performed to the upper part of the outer circumferential face of the sleeve 1, the pad part 10 is lifted, the fixing of the sleeve 1 is released, the sleeve 1 is rotated at a fixed angle with the axis as the center, and, with the part adjacent to the printed part on the sleeve 1 being fixed as the upper face, the pad 10 newly fitted with ink is lowered to perform printing to the upper part of the outer circumferential face. The process is repeated, and printing is performed to almost all the circumference of the outer circumferential face of the sleeve 1 by pad printing.

Description

  The present invention relates to a method for printing on substantially the entire circumference of an outer peripheral surface of a cylindrical metal body, for example, a sleeve for connecting an electric wire made of a copper tube.

  2. Description of the Related Art Conventionally, as a method of connecting electric wires stretched over in electrical work or the like, a cylindrical sleeve is used, and each end connecting two electric wires is stripped, and the sleeves are respectively opened from both ends. There is a method of connecting the electric wire by inserting the end of the sleeve and compressing the outside of the sleeve using a compression die. These operations may be indirect hot-line operations performed by remote operation.

  And in order to improve the accuracy and speed of work recently, the sleeve used by this method has a sleeve model number, a model number of the compression die used, a compression position of the compression die, It is required to print the number of compressions in advance.

As a method of printing on the outer peripheral surface of such a sleeve, there is a method of performing offset printing described in Patent Document 1. This offset printing is common, and based on the immiscibility of oil and water, an oily material or ink is selectively retained in the image area and dampening water is selectively retained in the non-image area. Accordingly, printing is performed by transferring the ink of the image portion that is brought into direct contact with the surface to be printed or indirectly through an intermediate called a blanket.
Japanese Patent Laid-Open No. 11-138970

  However, if an offset printing facility is newly provided and an attempt is made to print a model number or the like on the outer peripheral surface of the sleeve, a considerably high cost is required. When printing the above-mentioned model number on the outer peripheral surface of the sleeve by offset printing, specifically, it takes about 2 minutes to print the two sleeves. However, it is expected to work faster. Furthermore, since the offset printing uses UV (Ultra Violet) ink, the cost is high.

  The present invention has been made in view of these points, and provides a method for printing an outer peripheral surface of a cylindrical metal body that has low equipment costs and high printing speed even when new equipment is provided. This solves the above problems.

  According to the first aspect of the present invention, the cylindrical metal body is fixed substantially horizontally, a pad with ink is lowered from above the cylindrical metal body to press the outer peripheral surface of the cylindrical metal body, and the cylindrical Printing is performed on the upper part of the outer peripheral surface of the metal body, the pad is raised, the fixation of the cylindrical metal body is released, and the cylindrical metal body is rotated by a certain angle around the axis to The portion adjacent to the printing portion is fixed on the upper surface, the pad with newly applied ink is lowered, printing is performed on the upper portion of the outer peripheral surface, and the above steps are repeated to repeat the cylindrical metal body. An outer peripheral surface printing method for a cylindrical metal body, in which substantially the entire peripheral surface of the outer peripheral surface is printed by pad printing.

  According to a second aspect of the present invention, the cylindrical metal body is fixed by holding the rod-shaped workpiece fixing members with two gripping devices arranged opposite to each other, and between the tapered tip portions of these workpiece fixing members. The cylindrical metal body is positioned on the cylindrical metal body, and these two tapered tips are inserted into openings at both ends of the cylindrical metal body to support the cylindrical metal body. A radial direction fixing air cylinder provided in the lateral direction of the workpiece fixing member by pressing from behind the workpiece fixing member by a thrust direction fixing air cylinder provided on the rear side to fix the two workpiece fixing members. The method for printing the outer peripheral surface of the cylindrical metal body according to claim 1, wherein the movable block of the fixing device is pressed and the workpiece fixing member is clamped and fixed.

  The length in the longitudinal direction of the contact surface of the pad according to the invention of claim 3 is such that when the pad is pressed against the cylindrical metal body, both ends of the pad protrude from both ends of the cylindrical metal body. The outer periphery printing method for the cylindrical metal body according to claim 1 or 2 is used.

  According to each of the first, second, and third inventions, it is possible to provide a method for printing an outer peripheral surface of a cylindrical metal body that is much cheaper in equipment cost and faster in printing speed than in the case of conventional offset printing. .

  According to the second aspect of the present invention, the cylindrical metal body is fixed by the rod-shaped workpiece fixing member, the gripping device, the thrust direction fixing air cylinder, the fixing device, and the radial direction fixing air cylinder. Thus, the cylindrical metal body can be fixed and released more reliably, and as a result, printing can be performed reliably and promptly, and the reliability is high.

  According to invention of Claim 3, the length of the contact surface of the said pad is the length which the both ends of the pad protruded from the both ends of the said cylindrical metal body, when a pad is pressed on the said cylindrical metal body. Therefore, printing on both ends of the cylindrical metal body can be performed without distortion.

It is a front view which shows the outline of the outer peripheral surface printing method of the cylindrical metal body of the Example of this invention. It is a top view which shows a mode that the sleeve of the outer peripheral surface printing method of the cylindrical metal body of the Example of this invention is supported by the right-and-left workpiece | work fixing member. The top view which shows a mode that the sleeve of the outer peripheral surface printing method of the cylindrical metal body of the Example of this invention is supported by the right and left workpiece fixing members, and the workpiece fixing member is pressed and fixed from behind by the thrust direction fixing air cylinder. It is. The sleeve of the outer peripheral surface printing method of the cylindrical metal body of the embodiment of the present invention is supported by the left and right work fixing members, and the work fixing member is pressed and fixed from the rear by the thrust direction fixing air cylinder, and further, for radial direction fixing. It is a top view which shows a mode that the fixing device is press-fixed from the horizontal direction with an air cylinder. FIG. 4 is a schematic side view showing a relationship between a sleeve and a pad portion when printing a range of a quarter of the outer peripheral surface of the sleeve in the outer peripheral surface printing method of the cylindrical metal body according to the embodiment of the present invention; The figure is a view showing a state in which the pad portion is lowered with respect to the sleeve, (b) is a view showing a state in which the pad portion is in contact with the sleeve, and (c) is a view showing It is a figure which shows a mode that the pad part further presses with respect to the contact surface of a sleeve, and is printing the said 1/4 range. FIG. 5 is a partial front view showing the relationship between the length of the contact surface of the pad portion and the length of the sleeve in the outer peripheral surface printing method for a cylindrical metal body according to the embodiment of the present invention. It is a top view which shows the outer peripheral surface of the sleeve which printed by the pad printing in the outer peripheral surface printing method of the cylindrical metal body of the Example of this invention. It is a partial top view which shows a mode that the press to the movable block of the air cylinder for radial direction fixation is cancelled | released in the outer peripheral surface printing method of the cylindrical metal body of the Example of this invention. FIG. 6 is a partial plan view showing a state in which the first printing is finished and the sleeve is rotated in the outer peripheral surface printing method of the cylindrical metal body of the embodiment of the present invention. In the outer peripheral surface printing method for a cylindrical metal body according to the embodiment of the present invention, when the length of the pad portion when the pad portion is pressed against the sleeve is the same as that of the sleeve, both end portions of the pad portion are bent. It is a figure which shows a mode that distortion produced in printing of the end of a sleeve.

  The cylindrical metal body is fixed substantially horizontally, and the pad with ink is lowered from above the cylindrical metal body to press the outer peripheral surface of the cylindrical metal body, and the upper part of the outer peripheral surface of the cylindrical metal body Is printed, the pad is lifted, the fixation of the cylindrical metal body is released, and the cylindrical metal body is rotated by a certain angle around the axis so as to be adjacent to the printing place on the cylindrical metal body. Fix the place with the top surface, lower the newly padded ink and print on the top of the outer peripheral surface. Repeat these steps to repeat the entire outer periphery of the cylindrical metal body. Print the surface by pad printing.

  Accordingly, it is possible to provide a method for printing the outer peripheral surface of a cylindrical metal body, which is much cheaper in equipment cost and faster in printing speed than in the case of conventional offset printing.

  Hereinafter, a method for printing an outer peripheral surface of a cylindrical metal body according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a sleeve 1 for connecting electric wires is used as a cylindrical metal body. The sleeve 1 has a cylindrical shape, and the inner peripheral edge of both end openings is tapered. First, as shown in FIGS. 1 and 2, a first gripping device 2 is provided on a work table on a base 2 a made of a plate, and the first gripping device 2 grips a rod-shaped workpiece fixing member 6. doing. Moreover, the front-end | tip part of this workpiece | work fixing member 6 is tapered.

  A second gripping device 3 is provided on a base 3a made of a plate so as to face the first gripping device, and another third gripping device is provided on the rear side of the second gripping device 3. A device 4 is provided. Further, the second gripping device and the third gripping device grip a bar-like workpiece fixing member 7 similar to the workpiece fixing member 6. Further, the first gripping device 2, the second gripping device 3, and the third gripping device 4 are arranged on a straight line. Moreover, the front-end | tip part of this workpiece | work fixing member 7 is tapered.

  The base 2a provided with the first gripping device 2 and the base 3a provided with the second gripping device 3 and the third gripping device 4 can be moved forward and backward by an electric motor or the like (not shown). Accordingly, the base 2a and the base 3a can be brought close to and away from each other. Further, as will be described later, the workpiece fixing member 6 is fixed integrally with the workpiece fixing member 7 so as to be rotatable about an axis by an electric motor (not shown).

  Further, a thrust direction fixing air cylinder 8 is disposed on the rear side of the third gripping device 4, and as shown in FIGS. 1 and 2, between the second gripping device 3 and the third gripping device 4. In addition, a fixing device 5 including a fixed block 5a and a movable block 5b is provided on both sides of the workpiece fixing member 7, and the radial direction in which the movable block 5b is pressed to fix the movement of the workpiece fixing member 7 in the radial direction. A fixing air cylinder 9 is provided on the side of the movable block 5b.

  Further, flange parts 6a and 7a are provided on the work fixing members 6 and 7, respectively, and springs 6b and 7b are provided on the rear side of these flange parts 6a and 7a, respectively. When the workpiece fixing member 7 is pressed and fixed by the thrust direction fixing air cylinder 8 by operating the thrust member 8, the collar 6a abuts against the first gripping device via the spring 6b and receives the reaction force. The workpiece fixing members 6 and 7 can be firmly fixed. The workpiece fixing member 7 is also movable in the right direction in FIGS. 1 to 4, but is movable until the collar portion 7a hits the third gripping device via the spring 7b.

  As shown in FIG. 1, a flat plate-shaped pad portion 10 having a substantially downward cross section is provided above and below the left and right first gripping devices 2 and 3 so as to be movable up and down. . Further, as shown in FIG. 6, the length of the contact surface of the pad portion 10 in the longitudinal direction is such that both ends of the pad portion 10 protrude from both ends of the sleeve 1 when the pad portion 10 is pressed against the sleeve 1. Have a length of

  Pad printing is performed by the pad portion 10. The pad printing performed here is generally performed, but the ink to be used is an ink mainly composed of a chlorinated olefin resin. By using the chlorinated olefin resin as a main component, adhesion to metal and color development are improved.

  Next, the sleeve 1 is printed using this cylindrical metal outer peripheral surface printing method. First, as shown in FIG. 2, the first gripping device 2 and the workpiece fixing member 6 and the workpiece fixing member 7 of the second gripping device 3 which are arranged opposite to each other are respectively connected to the base 2a, The taper tips of the two workpiece fixing members 6 and 7 are simultaneously moved toward the sleeve 1 that is the object to be printed for each 3a, and the sleeve 1 is supported by being inserted into the openings at both ends of the sleeve 1.

  Thereafter, as shown in FIG. 3, the thrust direction fixing air cylinder 8 is operated, and the movable shaft 8a of the thrust direction fixing air cylinder 8 is pressed against the rear end of the work fixing member 7 to fix in the thrust direction. . Further, as shown in FIG. 4, the radial direction fixing air cylinder 9 is operated to press the movable block 5b toward the fixed block 5a, and the work fixing member 7 is held between the fixed block 5a and the movable block 5b by the fixing device 5. Then, the workpiece fixing members 6 and 7 and the sleeve 1 are fixed in the radial direction.

  Thereafter, as shown in FIG. 1, the pad portion 10 to which the printing ink is attached is lowered, and items such as the model number of the sleeve 1 are printed on the upper surface of the outer peripheral surface of the sleeve 1. At this time, as shown in FIG. 5, by pressing the pad portion 10 until it is compressed to a certain extent, a certain range on the outer peripheral surface of the sleeve 1 can be printed. Here, it is assumed that the printing range when the pad portion 10 is lowered once is 1/4 of the outer peripheral surface of the sleeve 1, that is, a range of 90 degrees.

  Further, as shown in FIG. 6, the length (L1) in the longitudinal direction of the contact surface of the pad portion 10 used here is 270 mm, the length (L2) of the sleeve 1 is 138 mm, and the outer diameter ( φ1) is 33 mm. When the pad portion 10 is pressed against the sleeve 1, the sleeve 1 is made to come to the center of the pad portion 10. For example, as shown in FIG. 6, the sleeve 1 is arranged so that there is room for the pad portion 10 (L3, L4) of 66 mm on the left and right outer sides. In this way, by leaving sufficient room on the left and right sides of the sleeve 1, printing at both ends of the sleeve 1 is not distorted as shown in FIG. It becomes possible to print clearly without shifting to the other end.

  In this case, if the length of the pad portion when the pad portion is pressed against the sleeve is made equal to that of the sleeve, both ends of the pad portion are bent, as shown in FIG. Distortion 11 may occur in the printing. This is not the case with the pad portion 10 of this embodiment.

  The printing items shown in FIG. 7 will be described. The circled numbers 1 to 4 indicate the places where compression is performed on the sleeve. “4 times on one side” and “8 times on one side” indicate the number of times of compression, respectively.

  When the first printing is completed, the pad portion 10 is lifted, and at the same time, as shown in FIG. 8, the radial fixing of the workpiece fixing member 7 is released by releasing the pressing and fixing of the radial direction fixing air cylinder 9 to the movable block 5b. Unlock the direction. Then, as shown in FIG. 9, the work fixing members 6 and 7 are rotated by the electric motor, whereby the sleeve 1 is rotated 90 degrees so that the portion adjacent to the printing portion is the upper surface. Thereafter, the pad portion 10 is lowered to print the printed matter on the outer peripheral surface of the sleeve 1. By performing this procedure two more times for a total of four times, printing is performed at 90 ° intervals over the entire outer circumference of the sleeve 1.

  Thereafter, the printed sleeve 1 is preferably subjected to a drying process in order to dry the printing portion. However, the drying process may be performed by moving the sleeve 1 after printing to the next process.

  In the above embodiment, a sleeve for connecting electric wires is used as the cylindrical metal body. However, the cylindrical metal body is not limited to the sleeve, and any cylindrical metal body in which the present invention can be implemented. anything is fine.

  Further, in the above embodiment, the length of the contact surface of the pad portion 10 in the longitudinal direction is 270 mm, the length of the sleeve 1 is 138 mm, and the outer diameter of the sleeve 1 is 33 mm. In the case of printing a large sleeve, for example, referring to the symbols in FIG. 6, when the sleeve length (L2) is 236 mm and the outer diameter (φ1) is 33 mm, the length of the contact surface of the pad portion in the longitudinal direction When the length (L1) is 368 mm and the sleeve is pressed by this pad portion, 66 mm of space (L3, L4) can be formed on the left and right outer sides of the sleeve. Of course, in the present invention, the length and size of the pad portion and the sleeve are not limited to those of these dimensions.

  Furthermore, in the case of printing a large sleeve, if the size fits within the pad portion, the range of ink attached to the pad portion, that is, the plate is changed without changing the size of the pad portion. It is possible to cope with it.

  In addition, the sleeve 1 is divided into four and printing is performed every 90 degrees, but of course, it is not limited to four divisions, and may be divided into three or other division numbers. Moreover, although the thing which has chlorinated olefin resin as a main component is used as an ink, as an ink to be used, it is not limited to this.

  In this embodiment, when the sleeve 1 is fixed, the gripping devices 2, 3, 4, the workpiece fixing members 6, 7, the fixing device 5, the thrust direction fixing air cylinder 8 and the radial direction fixing air cylinder 9 are provided. Although it is used, the sleeve 1 is not limited to the above-described fixing method, and other devices may be used as long as they are effective for pad printing on the entire outer peripheral surface of the cylindrical metal body.

DESCRIPTION OF SYMBOLS 1 Sleeve 2 Gripping device 2a Base 3 Gripping device 3a Base 4 Gripping device 5 Fixing device 5a Fixed block 5b Movable block 6 Work fixing member 7 Work fixing member 8 Thrust direction fixing air cylinder 9 Radial direction fixing air cylinder 10 Strain

According to the first aspect of the present invention, the cylindrical metal body is inserted and pressed into the inner periphery of the opening at both ends of the cylindrical metal body having both ends opened, and the distal ends of the rod-like workpiece fixing members each having a tapered tip are pressed. Is supported and fixed substantially horizontally by the two workpiece fixing members, and a pad with ink is lowered from above the cylindrical metal body to press the outer peripheral surface of the cylindrical metal body, and the cylindrical metal body Printing is performed on the upper part of the outer peripheral surface of the body, the pad is raised, the fixation of the cylindrical metal body is released, the cylindrical metal body is rotated by a fixed angle around the axis, and the cylindrical metal body is The portion adjacent to the printing portion is fixed on the upper surface, the pad with newly applied ink is lowered, printing is performed on the upper portion of the outer peripheral surface, and the above process is repeated to repeat the process of the cylindrical metal body. Cylindrical type that prints almost the entire outer peripheral surface by pad printing And the outer peripheral surface printing method of the genus body.

In the invention of claim 3, the length of the contact surface of the pad in the longitudinal direction is such that when the pad is pressed against the cylindrical metal body, both ends of the pad protrude from both ends of the cylindrical metal body. It was set as the outer peripheral surface printing method of the cylindrical metal body in any one of the said Claim 1 or 2 which has .

According to the invention of claim 1, the cylindrical metal body is supported and fixed by inserting and pressing the tip of the rod-shaped workpiece fixing member into the inner periphery of the openings at both ends of the cylindrical metal body. Therefore, the cylindrical metal body can be fixed and released more reliably, and as a result, printing can be performed reliably and promptly and the reliability is high. Furthermore, according to the invention of claim 2, the cylindrical metal body is fixed by a rod-shaped workpiece fixing member, a gripping device, a thrust direction fixing air cylinder, a fixing device, or a radial direction fixing air cylinder. As a result, the cylindrical metal body can be fixed and released more reliably, and as a result, printing can be performed reliably and promptly and the reliability is high.

Claims (3)

The cylindrical metal body is fixed substantially horizontally, and the pad with ink is lowered from above the cylindrical metal body to press the outer peripheral surface of the cylindrical metal body, and the upper part of the outer peripheral surface of the cylindrical metal body Print on
Raise the pad, release the fixation of the cylindrical metal body, rotate the cylindrical metal body by a certain angle around the axis, and place the printing metal on the cylindrical metal body adjacent to the printing area as the upper surface. Fix the pad with new ink and lower it to print on the outer periphery.
A method of printing the outer peripheral surface of a cylindrical metal body, characterized by repeating such steps and printing substantially the entire outer peripheral surface of the cylindrical metal body by pad printing. The cylindrical metal body is fixed as follows:
The rod-shaped workpiece fixing members are respectively gripped by two gripping devices arranged opposite to each other, and the cylindrical metal body is positioned between the tapered tip portions of these workpiece fixing members. Inserting the tip end of the cylindrical metal body into the openings at both ends of the cylindrical metal body to support the cylindrical metal body,
The thrust fixing air cylinder provided on the rear side of the at least one gripping device is pressed from behind the workpiece fixing member to fix the two workpiece fixing members, and is provided in the lateral direction of the workpiece fixing member. The method of printing an outer peripheral surface of a cylindrical metal body according to claim 1, wherein the workpiece fixing member is clamped and fixed by pressing the movable block of the fixing device with a radial direction fixing air cylinder. The longitudinal length of the contact surface of the pad is characterized in that when the pad is pressed against the cylindrical metal body, both ends of the pad protrude from the both ends of the cylindrical metal body. The outer periphery printing method of the cylindrical metal body according to claim 1 or 2.