Rubber Sampling Device

Abstract

To provide a rubber sampling device suppressing force applied to a die-cutting blade when die-cutting kneaded rubber as compared with a conventional one.SOLUTION: A rubber sampling device 10 includes: a first cylinder 30 including a first piston rod 31; a die-cutting blade 21; a blade receptacle 22; and a suction pad 51. The first piston rod 31 can expand and contract in a direction vertical to first and second surfaces 110a and 110b of kneaded rubber 110. The die-cutting blade 21 can be displaced between a first position P1 and a second position P2 accompanying the expansion and contraction of the first piston rod 31. The blade receptacle 22 has a guide hole 22a for storing the die-cutting blade 21 positioned at the second position P2. The suction pad 51 displaces the die-cutting blade 21 from the first position P1 to the second position P2 in the state of adsorbing the second surface 110. The die-cutting blade 21 and the blade receptacle 22 die-cut a sample piece S from the kneaded rubber 110.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a rubber sampling device. [Background technology]

[0002] In tire manufacturing, sample pieces are taken from kneaded rubber before it is processed into tires, and rubber performance is measured. The tire manufacturing process includes a step of cooling sheet-shaped kneaded rubber extruded from an extruder and transporting it on a conveyer, and conventionally, sample pieces are taken from the kneaded rubber on the conveyer. For example, a rubber sampling device for taking sample pieces from kneaded rubber is disclosed in Patent Document 1 below.

[0003] The rubber sampling device disclosed in Patent Document 1 includes a cutter, a cylinder, and a receiving blade. In the rubber sampling device, the cylinder causes the cutter to reciprocate vertically toward the surface of the kneaded rubber, and the cutter punches out a portion of the kneaded rubber from one side (the surface side) to collect a sample piece. When the cutter punches out the kneaded rubber, the receiving blade is located on the other side (the back side) of the kneaded rubber and directly receives the kneaded rubber. In other words, in the rubber sampling device of Patent Document 1, the receiving blade plays a role similar to a so-called cutting board. And, in the rubber sampling device of Patent Document 1, with the receiving blade located on the back side of the kneaded rubber, the cutter is pressed against the kneaded rubber and the receiving blade from the front side, the kneaded rubber is sandwiched between the receiving blade and the cutter, and the kneaded rubber is pushed through by the cutter to obtain a sample piece. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-044680 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the rubber sampling device of Patent Document 1, it is necessary to apply a force to the cutter to pinch and cut the kneaded rubber between the receiving blade and the cutter. For this reason, the rubber sampling device requires a large cylinder. Also, in the rubber sampling device, the force of the cutter pushing the kneaded rubber through must be supported by the receiving blade, so the frame supporting the receiving blade must be strong.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to reduce the force applied to a die-cutting blade when die-cutting kneaded rubber in a rubber sampling device, compared to conventional techniques. [Means for solving the problem]

[0007] A rubber sampling device according to one aspect of the present invention is a rubber sampling device for punching out and collecting sample pieces from a sheet-like kneaded rubber, and is provided with a main body frame, a first cylinder having a first piston rod fixed to the main body frame and capable of extending and retracting, a punching blade fixed to the first piston rod and displaced as the first piston rod extends and retracts, a blade receiver fixed to the main body frame, and a suction section having a suction pad capable of adsorbing the kneaded rubber, and the first piston rod is capable of extending and retracting in a direction perpendicular to a first surface and a second surface of the kneaded rubber, and the punching blade is movable in a direction perpendicular to the first surface and a second surface of the kneaded rubber. The die-cutting blade is displaceable between a first position on the first surface side of the kneaded rubber and a second position on the second surface side as the piston rod extends and retracts, the blade receiver is positioned on the second surface side of the kneaded rubber and has a guide hole that accommodates the die-cutting blade positioned at the second position, and when the die-cutting blade is positioned at the first position, the suction pad is positioned at a position where it can adsorb the second surface of the kneaded rubber, and with the second surface adsorbed by the suction pad, the die-cutting blade is displaced from the first position to the second position, and the sample piece is cut out from the kneaded rubber by the die-cutting blade and the blade receiver.

[0008] Preferably, the rubber sampling device further includes a second cylinder fixed to the main body frame and having an extendable second piston rod, the suction pad being fixed to the second piston rod and displaceable as the second piston rod extends and retracts, and when the die cutting blade is located at the first position, the second piston rod extends, thereby positioning the suction pad in a position where it can adsorb the second surface of the kneaded rubber.

[0009] Preferably, in this rubber sampling device, when the die cutting blade is located at the second position, the suction pad can adsorb the sample piece.

[0010] Preferably, the rubber sampling device further includes a pressing portion around the die cutting blade capable of pressing the first surface of the kneaded rubber, and when the die cutting blade is displaced from the first position to the second position, the pressing portion presses the first surface.

[0011] Preferably, in this rubber sampling device, the suction portion is disposed inside the blade receiver.

[0012] Preferably, in this rubber sampling device, the cutting edge of the die cutting blade is inclined with respect to the first surface of the kneaded rubber.

[0013] Preferably, in this rubber sampling device, the die cutting blade and the blade receiver are rectangular when viewed from the displacement direction of the die cutting blade. Effect of the Invention

[0014] According to the rubber sampling device of the present invention, the force applied to the die-cutting blade when die-cutting kneaded rubber can be reduced compared to the conventional device. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing an overall configuration of a kneaded rubber processing apparatus. [Diagram 2]FIG. 1 is a schematic diagram showing a rubber sampling device according to an embodiment of the present invention. [Diagram 3] FIG. 4 is a schematic diagram illustrating the periphery of the cutter unit. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 2 is an explanatory diagram showing the procedure for punching out a sample piece using the rubber sampling device (the punching blade is in the first position P1 before punching). [Figure 7] An explanatory diagram showing the procedure for demolding sample pieces using a rubber sampling device (kneaded rubber is adsorbed by an adsorption pad before demolding). [Figure 8] FIG. 2 is an explanatory diagram showing the procedure for demolding sample pieces using a rubber sampling device (state immediately before demolding). [Figure 9] 1 is an explanatory diagram showing the procedure for punching out a sample piece using the rubber sampling device (the punching blade is in the second position P2 after punching). FIG. [Figure 10] FIG. 2 is an explanatory diagram showing the procedure for punching out a sample piece using the rubber sampling device (the punching blade is in the first position P1 after punching). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] [Overall configuration of kneaded rubber processing equipment] FIG. 1 is a schematic diagram of a kneaded rubber processing apparatus equipped with a rubber sampling device according to an embodiment of the present invention. As shown in FIG. 1, the kneaded rubber processing apparatus 100 is equipped with a cooling bar 101, a pickup device 102, a conveyor 103, a stacker 104, and a rubber sampling device 10. The kneaded rubber processing apparatus 100 is supplied with sheet-shaped kneaded rubber 110 extruded from an extruder (not shown) located upstream (rear) of the kneaded rubber processing apparatus 100. In the kneaded rubber processing apparatus 100, the kneaded rubber 110 is cooled by passing it through the cooling bar 101, and is transferred to a belt-type conveyor 103 by the pickup device 102 and conveyed by the conveyor 103. The kneaded rubber 110 is in a state of hanging down from the front end of the conveyor 103, and is folded and stacked by a stacker 104 that reciprocates in an approximately horizontal direction. In the following description, for convenience of explanation, the front, rear, upper and lower of the kneaded rubber processing device 100 are defined based on the conveying direction of the kneaded rubber 110 in the kneaded rubber processing device 100. Specifically, as shown in Fig. 1, the front and rear of the kneaded rubber processing device 100 are defined based on the conveying direction of the kneaded rubber 110, and the upper and lower of the kneaded rubber processing device 100 are defined based on the direction of the kneaded rubber 110 hanging down from the front of the conveyor 103.

[0017] As shown in Fig. 1, the rubber sampling device 10 is a device for collecting sample pieces S from kneaded rubber 110 transported by a conveyor 103. In this embodiment, an example is shown in which the rubber sampling device 10 collects sample pieces S from the kneaded rubber 110 hanging down from the conveyor 103 toward a stacker 104. The position of the rubber sampling device 10 in the kneaded rubber processing device 100 is not limited to this, and for example, the rubber sampling device 10 may be arranged above the conveyor 103 midway in the front-to-rear direction to collect sample pieces S from the kneaded rubber 110 on the conveyor 103.

[0018] The sample pieces S are used in various tests to confirm the properties (Mooney viscosity, vulcanization characteristics, etc.) of the kneaded rubber 110 as they are after they have been collected. The sample pieces S are also used in various tests to confirm the properties (hardness, tensile strength, etc.) of the rubber after they have been subjected to processing (vulcanization) such as heating and pressing.

[0019] [About the rubber sampling device 10] Fig. 2 is a view of the rubber sampling device 10 as viewed from the direction of arrow A shown in Fig. 1, and the kneaded rubber 110 shown in Fig. 2 hangs down from the front side of the page to the back side of the page. As shown in Fig. 2, the rubber sampling device 10 includes a cutter unit 20, a first cylinder 30, a second cylinder 35, a main body frame 40, an adsorption section 50, and a pressing section 60. In the following description, the front surface of the kneaded rubber 110 cut out by the rubber sampling device 10 is referred to as the first surface 110a, and the rear surface of the kneaded rubber 110 is referred to as the second surface 110b.

[0020] [Regarding the first cylinder 30 and the main body frame 40] As shown in FIG. 2, the first cylinder 30 is fixed to the main body frame 40. The first cylinder 30 is a pneumatic cylinder that serves as a drive source for the cutter unit 20, and includes a first piston rod 31 and a flange portion 32. The first piston rod 31 is a shaft portion that protrudes rearward from the cylinder body 30a, and is configured to be displaceable in the front-rear direction (thickness direction of the kneaded rubber 110) to change the protruding length from the cylinder body 30a. In the following description, changing the protruding length of the first piston rod 31 is also referred to as the first piston rod 31 expanding and contracting (shrinking and extending). The flange portion 32 is a portion for fixing the base portion 23 of the die cutting blade 21, which will be described later, and is fixed to the rear end of the first piston rod 31. In the present embodiment, the first cylinder 30 is exemplified as a pneumatic cylinder, but the first cylinder 30 may be an electric actuator, a hydraulic cylinder, or the like.

[0021] [Regarding the second cylinder 35] As shown in FIG. 2, the second cylinder 35 is fixed to the main body frame 40. The second cylinder 35 is a pneumatic cylinder that serves as a drive source for the suction unit 50, and has a second piston rod 36. The second piston rod 36 is a shaft portion that protrudes forward from the cylinder body 35a, and is configured to be displaceable in the front-rear direction (thickness direction of the kneaded rubber 110) to change the protruding length from the cylinder body 35a. In the following description, changing the protruding length of the second piston rod 36 is also referred to as the second piston rod 36 expanding and contracting (retracting and extending). In this embodiment, the second cylinder 35 is illustrated as a pneumatic cylinder, but the second cylinder 35 may be an electric actuator, a hydraulic cylinder, or the like.

[0022] [Cutter unit 20] Fig. 3 is a schematic diagram showing the periphery of the cutter unit. The cutter unit 20 shown in Fig. 2 and Fig. 3 is a tool for punching out a sample piece S (see Fig. 1), and includes a punching blade 21 and a blade receiver 22. Note that in Fig. 3, in order to show the inside of the punching blade 21, the punching blade 21 and a part of the blade receiver 22 are omitted from the illustration.

[0023] 2 and 3, the punching blade 21 has a base 23 and a cutter blade 24. The base 23 of the punching blade 21 is fixed to a flange portion 32, and the punching blade 21 is supported by a main body frame 40 via a first cylinder 30. The punching blade 21 is capable of being displaced in the front-rear direction in accordance with the extension and contraction of a first piston rod 31 (see FIG. 2).

[0024] The cutter blade 24 is a tool for cutting (cutting out) the kneaded rubber 110. As shown in FIG. 4, in this embodiment, the shape of the sample piece S to be cut out from the kneaded rubber 110 is rectangular (quadrangle). For this reason, in the cutter unit 20 of this embodiment, four plate-like cutter blades 24A to 24D are arranged in a rectangular shape to form the cutting blade 21. The shape of the sample piece S collected using the rubber sampling device 10 is not limited to a rectangle, and may be, for example, a circle. When the shape of the sample piece S is circular, one cutter blade with a circular cutting edge can be used.

[0025] 3, the base 23 has mounting portions 25 for mounting the cutter blades 24. In the cutter unit 20 of the present embodiment, the base 23 is provided with four mounting portions 25 so that the four cutter blades 24A to 24D (see FIG. 4) can be mounted in a rectangular shape.

[0026] FIG. 5 is a diagram showing the details of the cutter blade 24. As shown in FIG. 5, the cutting edge 24a of the cutter blade 24 when viewed from the plate thickness direction is a concave V-shape, and has two pointed ends 24b. The cutting edge 24a of the cutter blade 24 is inclined at an angle θ with respect to the first surface 110a of the kneaded rubber 110 to be cut out. The cutter blade 24 having such a V-shape has a smaller contact area with the kneaded rubber 110 when cutting into the kneaded rubber 110 than a conventional cutter blade in which the cutting edge is parallel to the first surface 110a and linear. Therefore, the cutter blade 24 can cut into the kneaded rubber 110 with less force than a cutter blade whose cutting edge is linear. The shape of the cutter blade 24 is not limited to this, and for example, the cutting edge 24a may be a convex V-shape with one pointed end. The cutter blade 24 has an attachment hole 28 for attaching the cutter blade 24 to the attachment part 25.

[0027] The mounting portion 25 has a screw hole 27 into which the bolt 26 can be screwed. As shown in Figures 3 and 5, the cutter blade 24 is fixed to the mounting portion 25 by inserting the bolt 26 into the mounting hole 28 and screwing the bolt 26 into the screw hole 27.

[0028] Thus, in the rubber sampling device 10 of this embodiment, the cutting edge 24a of the die-cutting blade 21 is inclined at an angle θ with respect to the first surface 110a of the kneaded rubber 110. With a rubber sampling device 10 configured in this manner, it is possible to cause the cutter blade 24 to cut into the kneaded rubber 110 with less force than in the case where the cutting edge is parallel to the first surface 110a.

[0029] As shown in Fig. 2, the punching blade 21 is attached to the main body frame 40 via the first cylinder 30, and is displaceable in accordance with the extension and contraction of the first piston rod 31. Specifically, as shown in Fig. 3, the punching blade 21 is displaceable in the front-rear direction between a first position P1 and a second position P2. Note that the punching blade 21 of this embodiment may be displaceable further forward than the first position P1, or may be displaceable further rearward than the second position P2.

[0030] The first position P1 is the position of the punching blade 21 before punching out the sample piece S from the kneaded rubber 110. As shown in Fig. 3, when the punching blade 21 is positioned at the first position P1, the cutting edge 24a of the cutter blade 24 is entirely positioned on the first surface 110a side of the kneaded rubber 110.

[0031] The second position P2 is the position of the punching blade 21 after the sample piece S has been punched out of the kneaded rubber 110. As shown in Fig. 3, the punching blade 21 positioned at the second position P2 has the entire blade tip 24a positioned on the second surface 110b side of the kneaded rubber 110. In this description, the position of the punching blade 21 is expressed based on the position of the tip 24b of the cutter blade 24. In other words, the punching blade 21 at the first position P1 has the tip 24b positioned at the first position P1, and the punching blade 21 at the second position P2 has the tip 24b positioned at the second position P2.

[0032] As shown in Figs. 2 to 4, the blade receiver 22 is a member for receiving the punching blade 21, and is fixed to the main body frame 40. The blade receiver 22 is disposed on the second surface 110b side of the kneaded rubber 110, and the end portion 22b is capable of contacting the second surface 110b. The blade receiver 22 is formed with a guide hole 22a, and has a rectangular shape into which the punching blade 21 (cutter blades 24A to 24D) can be inserted. In this embodiment, the cross-sectional shape of the guide hole 22a is rectangular (quadrilateral) in accordance with the shape of the sample piece S and the cutter blades 24A to 24D. As shown in Figs. 3 and 4, when the punching blade 21 is displaced from the first position P1 to the second position P2, the cutting edge 24a of the cutter blade 24 is accommodated in the guide hole 22a of the blade receiver 22.

[0033] Thus, in the rubber sampling device 10 of this embodiment, the punching blade 21 and the blade receiver 22 are rectangular when viewed from the displacement direction of the punching blade 21. According to the rubber sampling device 10 configured in this manner, a flat cutter blade 24 can be used, so that the rubber sampling device 10 can be simply configured.

[0034] As shown in Figures 3 and 4, in the rubber sampling device 10, the blade receiver 22 does not come into direct contact with the punching blade 21. Therefore, in the rubber sampling device 10, the force applied from the first cylinder 30 to the punching blade 21 when punching the sample piece S acts on the blade receiver 22 via the kneaded rubber 110. In other words, in the rubber sampling device 10, the force applied from the first cylinder 30 to the punching blade 21 when punching the sample piece S does not act directly from the punching blade 21 to the blade receiver 22. Therefore, in the rubber sampling device 10, the force applied from the punching blade 21 to the blade receiver 22 is suppressed compared to conventional rubber sampling devices in which the punching blade directly presses the blade receiver.

[0035] [Adsorption part 50] 3, the suction part 50 includes a suction pad 51, a piping member 52, and an extension mechanism 53. The suction part 50 is a site for suctioning the second surface 110b of the kneaded rubber 110 and the sample piece S, and is disposed inside the blade receiver 22.

[0036] The suction pad 51 is a circular suction cup capable of suctioning the kneaded rubber 110 (sample piece S), and a piping member 52 is connected to the front end surface of the suction pad 51. The piping member 52 is connected to a vacuum piping facility (not shown) including a vacuum pump and the like. The suction unit 50 can suction the kneaded rubber 110 (sample piece S) by evacuating the inside of the suction cup through the piping member 52 with the suction pad 51 facing the kneaded rubber 110. The suction unit 50 can release the suction of the kneaded rubber 110 (sample piece S) by stopping the evacuation of the inside of the suction cup by the piping member 52 and opening the inside of the suction cup to the atmosphere.

[0037] The piping member 52 is attached to the main body frame 40 via the telescopic mechanism 53 and the second cylinder 35 so as to be displaceable. The telescopic mechanism 53 has a spring member 54. The suction pad 51 and the piping member 52 are displaced relative to the main body frame 40 (the blade receiver 22) in response to the expansion and contraction of the spring member 54. The piping member 52 is fixed to the main body frame 40 via the second cylinder 35. The piping member 52 is displaceable in the front-rear direction in response to the expansion and contraction of the second piston rod 36. The suction pad 51 and the piping member 52 are displaced by the second cylinder 35 between a position where the suction pad 51 can contact the second surface 110b of the kneaded rubber 110 and a position where they do not contact each other.

[0038] The suction pad 51 is disposed forward of the end 22b of the blade receiver 22 when the second piston rod 36 is most contracted and the spring member 54 is most extended. The suction pad 51 is disposed in a position that does not protrude forward from the end 22b when the second piston rod 36 is most contracted and the spring member 54 is most contracted. The suction unit 50 is configured such that when the second piston rod 36 is further extended after the suction pad 51 comes into contact with the kneaded rubber 110, the spring member 54 is contracted and the suction pad 51 and the piping member 52 are displaced relative to the main body frame 40. At this time, the spring member 54 is compressed, so that a spring force is generated in the spring member 54. The suction unit 50 can suction the kneaded rubber 110 with the suction pad 51 while pressing the suction pad 51 against the second surface 110b of the kneaded rubber 110 by the spring force of the spring member 54.

[0039] Thus, in the rubber sampling device 10 of this embodiment, the suction unit 50 is disposed inside the blade receiver 22. According to the rubber sampling device 10 configured in this manner, it becomes possible to suction and hold the portion of the kneaded rubber 110 that will become the sample piece S.

[0040] [Pressing part 60] 3, the pressing portion 60 includes a pillar member 61, a pressing plate 62, and an extending / retracting mechanism 63, and is attached to the base 23. The pressing portion 60 is a portion for pressing the kneaded rubber 110 against the blade receiver 22 when the die cutting blade 21 is displaced from the first position P1 to the second position P2. In this embodiment, a total of four pressing portions 60 are disposed at positions on the outer sides of the four cutter blades 24.

[0041] The pillar member 61 has a first member 61a and a second member 61b. The first member 61a is a cylindrical member and is fixed to the base 23. The first member 61a has an inner diameter into which the second member 61b can be inserted. The second member 61b is a cylindrical member and is axially displaceable along the first member 61a when inserted into the first member 61a. The pillar member 61 has a pressing plate 62 at the end on the second member 61b side. The expansion mechanism 63 is provided between the first member 61a and the second member 61b. The expansion mechanism 63 has a spring member 64.

[0042] The pressing plate 62 is a plate-shaped portion that comes into surface contact with the first surface 110a of the kneaded rubber 110. The pressing plate 62 in this embodiment is configured as a circular plate-shaped member. Note that the shape of the pressing plate 62 is not limited to this, and may be rectangular (square or oblong).

[0043] When the spring member 64 is in a fully extended state, the pressing plate 62 can be positioned behind the die-cutting blade 21. When the spring member 64 is in a fully contracted state, the pressing plate 62 can be positioned ahead of the tip 24b of the cutter blade 24.

[0044] As shown in Fig. 3, the pressing plate 62 can be positioned behind the die-cutting blade 21 when the die-cutting blade 21 is located at the first position P1. When the first piston rod 31 is extended from this state, the die-cutting blade 21 is displaced rearward. At this time, the pressing plate 62 comes into contact with the kneaded rubber 110 before the die-cutting blade 21 comes into contact with the first surface 110a of the kneaded rubber 110. When the first piston rod 31 is further extended after the pressing plate 62 comes into contact with the kneaded rubber 110, the spring member 64 of the pressing section 60 is contracted and the pillar member 61 is shortened. At this time, the pressing plate 62 presses the first surface 110a of the kneaded rubber 110 due to the spring force of the spring member 64 trying to return to its original length. In this embodiment, the kneaded rubber 110 around the die cutting blade 21 is locally pressed by four pressing portions 60 (pressing plates 62) arranged around the die cutting blade 21, but the configuration of the pressing plates 62 is not limited to this, and the pressing plates 62 may be capable of pressing so as to surround the periphery of the die cutting blade 21 (in a rectangular shape).

[0045] [Procedure for collecting sample pieces S using rubber sampling device 10] 6 to 10 are explanatory diagrams showing the procedure for punching out the sample piece S by the rubber sampling device 10. In order to show the inside of the punching blade 21, the punching blade 21 (cutter blade 24) and part of the blade receiver 22 are not shown in Figs. 6 to 10. As shown in Fig. 6, when punching out the sample piece S by the rubber sampling device 10 starts, the punching blade 21 is located at the first position P1. At this time, the end 22b of the blade receiver 22 is in contact with the second surface 110b of the kneaded rubber 110. At this time, the pressing plate 62 of the pressing unit 60 is separated from the first surface 110a, and the suction pad 51 of the suction unit 50 is separated from the second surface 110b.

[0046] Next, the conveyor 103 (see FIG. 1) is stopped to temporarily stop the conveyance of the kneaded rubber 110, and the second piston rod 36 is extended to bring the suction pad 51 into contact with the second surface 110b, as shown in FIG.

[0047] Next, as shown in Fig. 8, the first piston rod 31 (see Fig. 2) is extended to move the punching blade 21 closer to the first surface 110a. Then, the pressing plate 62 eventually comes into contact with the first surface 110a. In the state shown in Fig. 8, the second surface 110b on the inside of the punching blade 21 is sucked by the suction pad 51, and the first surface 110a around the punching blade 21 and the blade receiver 22 is pressed by the pressing plate 62.

[0048] As described above, the rubber sampling device 10 of this embodiment is further provided with the second cylinder 35 having the extendable second piston rod 36 fixed to the main body frame 40. The suction pad 51 is fixed to the second piston rod 36 and is displaceable in accordance with the extension and contraction of the second piston rod 36. When the die cutting blade 21 is located at the first position P1, the second piston rod 36 extends, thereby disposing the suction pad 51 at a position where it can adsorb the second surface 110b of the kneaded rubber 110.

[0049] According to the rubber sampling device 10 configured as above, when the die cutting blade 21 is displaced from the first position P1 to the second position P2, the second surface 110b can be reliably held by the suction pad 51.

[0050] Next, as shown in Fig. 9, when the first piston rod 31 (see Fig. 2) is further extended to displace the punching blade 21 further rearward, the punching blade 21 (cutter blades 24A to 24D (see Fig. 4)) cuts into the kneaded rubber 110 from the first surface 110a side. Then, when the punching blade 21 is displaced to the second position P2, a rectangular sample piece S is punched out from the kneaded rubber 110. At this time, the blade tip 24a of each of the cutter blades 24A to 24D (see Fig. 4) is housed in the guide hole 22a.

[0051] When the punching blade 21 is in the second position P2, the pressing plate 62 can be positioned forward of the pointed end 24b of the cutter blade 24, and continues to press the kneaded rubber 110 around the punching blade 21. When the sample piece S is punched out of the kneaded rubber 110, the spring force of the spring member 54 displaces the piping member 52 forward, and the suction pad 51 displaces forward of the end 22b. As a result, the sample piece S is discharged to the outside of the guide hole 22a while being sucked by the suction pad 51.

[0052] In this way, the rubber sampling device 10 of this embodiment further includes a pressing unit 60 capable of pressing the first surface 110a of the kneaded rubber 110 around the die cutting blade 21. In the pressing unit 60, the pressing plate 62 presses the first surface 110a when the die cutting blade 21 displaces from the first position P1 to the second position P2. In the pressing unit 60, the pressing plate 62 presses the first surface 110a around the die cutting blade 21 from before the die cutting blade 21 comes into contact with the first surface 110a of the kneaded rubber 110 until it displaces to the second position P2.

[0053] With the rubber sampling device 10 configured as described above, the kneaded rubber 110 around the punching blade 21 (the periphery of the part to be punched) can be pressed by the pressing section 60 while punching. This makes it possible to prevent the kneaded rubber 110 from being pulled into the blade receiver 22 during punching, and makes it possible to ensure that the collected sample pieces S have a consistent shape. For this reason, by using the rubber sampling device 10, it becomes easy to use the sample pieces S for tests such as confirming rubber performance.

[0054] Next, as shown in Fig. 10, the first piston rod 31 (see Fig. 2) is contracted to displace the punching blade 21 forward. When the punching blade 21 (pointed end 24b) is displaced to the first position P1, the sample piece S is discharged from the inside of the punching blade 21 to the outside while being adsorbed to the suction pad 51, and becomes removable. With the rubber sampling device 10, the sample piece S can be collected from the kneaded rubber 110 using the procedure described above.

[0055] In this manner, in the rubber sampling device 10 of the present embodiment, when the punching blade 21 is located at the second position P2, the suction pad 51 can suction the sample piece S. According to the rubber sampling device 10 configured in this manner, the collected sample piece S can be easily collected.

[0056] The rubber sampling device 10 of the present embodiment described above punches out and collects a sample piece S from a sheet-like kneaded rubber 110. The rubber sampling device 10 includes a main body frame 40, a first cylinder 30 having a first piston rod 31 that is fixed to the main body frame 40 and can be extended and retracted, a punching blade 21 that is fixed to the first piston rod 31 and displaces with the extension and retraction of the first piston rod 31, a blade receiver 22 that is fixed to the main body frame 40, and an adsorption section 50 having an adsorption pad 51 that can adsorb the kneaded rubber 110. The first piston rod 31 can be extended and retracted in a direction perpendicular to the first surface 110a and the second surface 110b of the kneaded rubber 110, and the punching blade 21 can be displaced between a first position P1 on the first surface 110a side of the kneaded rubber 110 and a second position P2 on the second surface 110b side with the extension and retraction of the first piston rod 31. The blade receiver 22 is disposed on the side of the second surface 110b of the kneaded rubber 110, and has a guide hole 22a that accommodates the punching blade 21 located at the second position P2. When the punching blade 21 is located at the first position P1, the suction pad 51 is disposed at a position where it can adsorb the second surface 110b of the kneaded rubber 110, and with the suction pad 51 adsorbing the second surface 110b, the punching blade 21 is displaced from the first position P1 to the second position P2, and a sample piece S is punched out from the kneaded rubber 110 by the punching blade 21 and the blade receiver 22.

[0057] According to the rubber sampling device 10 having such a configuration, the cutter blade 24 can be caused to cut into the kneaded rubber 110 with less force, so that the force applied to the cutter blade 24 when the kneaded rubber 110 is cut out can be suppressed compared to the conventional case. Furthermore, in the rubber sampling device 10, the force when the cutter blade 24 cuts into the kneaded rubber 110 is not directly received by the blade receiver 22, so that it is possible to use a main body frame 40 that supports the blade receiver 22 and that has less strength and is simpler. According to such a rubber sampling device 10, the kneaded rubber 110 can be cut out while being held by the suction part 50. This allows the force applied to the cutter blade 24 to act on the kneaded rubber 110 efficiently, and the force applied to the cutter blade 24 can be suppressed compared to the conventional case.

[0058] In the rubber sampling device 10 of this embodiment, the main body frame 40 and the like can be simplified, making it possible to reduce installation space and manufacturing costs compared to conventional rubber sampling devices. Therefore, by using the rubber sampling device 10, it is possible to increase the number of rubber sampling devices 10 installed in the kneaded rubber processing device 100 compared to the conventional case. In this case, it is possible to increase the number of sample pieces S that can be collected at one time when the conveying line is temporarily stopped. In recent years, with further improvements in the performance required for tires, the number of rubber performance inspections has been increasing, and by using the rubber sampling device 10, it is possible to accommodate the increased number of inspections.

[0059] The embodiments disclosed above are illustrative in all respects and are not restrictive. In other words, the jig of the present invention is not limited to the illustrated forms and may have other forms within the scope of the present invention. [Industrial Applicability]

[0060] The rubber sampling device described above can be widely used not only for taking sample pieces from kneaded rubber for manufacturing tires, but also for taking sample pieces from sheet-shaped rubber. [Explanation of symbols]

[0061] 10 Rubber Sampling Device 21 Die cutting blade 22 Blade holder 22a Guide hole 24a (cutting edge) 30 No. 1 cylinder 31 First piston rod 35 No. 2 cylinder 36 Second piston rod 40 Main frame 50 Adsorption part 51 Suction Pad 60 Pressing part 110 Kneaded rubber 110a 1st page 110b 2nd side S sample piece P1 1st position P2 2nd position

Claims

1. A rubber sampling device for cutting and collecting sample pieces from a sheet of kneaded rubber, A body frame, a first cylinder fixed to the body frame and having a first piston rod which is extendable and contractible; a die cutting blade fixed to the first piston rod and displaced in accordance with extension and contraction of the first piston rod; a blade receiver fixed to the main body frame; an adsorption section having an adsorption pad capable of adsorbing the kneaded rubber; Equipped with the first piston rod is extendable and retractable in a direction perpendicular to the first surface and the second surface of the kneaded rubber, the die cutting blade is displaceable between a first position on the first surface side of the kneaded rubber and a second position on the second surface side thereof in accordance with extension and contraction of the first piston rod, the blade receiver is disposed on the second surface side of the kneaded rubber and has a guide hole for accommodating the die-cutting blade located at the second position, the suction pad is disposed at a position where it can suction the second surface of the kneaded rubber when the die cutting blade is located at the first position, A rubber sampling device in which, while the second surface is adsorbed by the suction pad, the die-cutting blade is displaced from the first position to the second position, and the sample piece is cut out from the kneaded rubber by the die-cutting blade and the blade receiver.

2. A second cylinder is fixed to the main body frame and has a second piston rod that is extendable and retractable. The suction pad is fixed to the second piston rod and is displaceable in accordance with the extension and contraction of the second piston rod, 2. The rubber sampling device according to claim 1, wherein when the die cutting blade is located at the first position, the second piston rod extends, thereby positioning the suction pad at a position where it can suction the second surface of the kneaded rubber.

3. 3. The rubber sampling device according to claim 1, wherein the suction pad is capable of suctioning the sample piece when the die cutting blade is located at the second position.

4. a pressing portion that is capable of pressing the first surface of the kneaded rubber around the die cutting blade, The rubber sampling device according to claim 1 , wherein the pressing portion presses the first surface when the die cutting blade is displaced from the first position to the second position.

5. The adsorption portion is The rubber sampling device according to claim 1 , wherein the rubber sampling device is disposed inside the blade receiver.

6. 6. The rubber sampling device according to claim 1, wherein a cutting edge of the die cutting blade is inclined with respect to the first surface of the kneaded rubber.

7. The rubber sampling device according to claim 1 , wherein the die cutting blade and the blade receiver are rectangular when viewed from a displacement direction of the die cutting blade.

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