JP6031398B2 - Manufacturing method of blade rubber - Google Patents

Description

  The present invention relates to a blade rubber manufacturing method.

  Conventionally, a wiper blade of a vehicle wiper device includes a lever member and a long blade rubber having a base portion gripped by the lever member and a wiping portion extending downward and wiping the wiping surface at a lower end portion. ing.

  And as a manufacturing method of a blade rubber, it forms simultaneously a pair of symmetrical blade rubber which the lower end part of the wiping part was connected, and after that, the position corresponding to the lower end part of the wiping part is the upper circular blade and the lower circular blade There is a method of forming a blade rubber by cutting (specifically, for example, cutting with a blade and tearing by hand) (for example, see Patent Document 1).

Japanese Patent No. 3134209

  By the way, when manufacturing the manufacturing method as described above, it is necessary to relatively move the upper circular blade, the lower circular blade, and the blade rubber in the longitudinal direction of the blade rubber. For example, the blade rubber is entirely made of an elastic member. It is necessary to feed the blade rubber (elastic member) in the longitudinal direction by contacting the feed member and rotating the feed member.

  However, when sending the blade rubber, it is difficult to send it accurately because the elastic member bends in each direction. Therefore, for example, there is a possibility that the cut portion is shaken and the lower end portion of the wiping portion is wavy along the longitudinal direction, which causes a reduction in wiping performance.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for manufacturing a blade rubber capable of accurately feeding the blade rubber in the longitudinal direction.

Method of manufacturing a blade rubber for solving the above-mentioned problems, hard resin member than the elastic member of the base side of the wiping portion to the lower end of the wiping portion as well as have a wiping unit for wiping the wiping surface extends from the base downward A method of manufacturing a long blade rubber provided with a molding step of molding a pair of the blade rubber so that both the resin members are integrated in an opposed state in which the two resin members are connected to each other, and the resin member a separation step that the rubber blade at said transmission Ri member is brought into contact with the feed member by cutting while seeking the resin member feed in the longitudinal direction to form the blade rubber
Equipped with .

  According to this method, since the feed member is brought into contact with a resin member harder than the elastic member and the blade rubber is sent in the longitudinal direction by the feed member, compared with the case where the feed member is brought into contact with the elastic member and sent. More accurate feeding with suppressed deflection is possible.

  In addition, a lower end wiping portion made of a resin member harder than the elastic member on the base side of the wiping portion can be provided at the lower end portion of the wiping portion of the blade rubber manufactured by the same method. The contact width at the time of being wiped can be reduced, and the frictional force during wiping can be reduced.

According to this method, a pair of blade rubbers are molded so as to be integral with each other in a state where both resin members are connected to each other, and the feed member is brought into contact with the resin member, and the blade rubber is formed by the feed member. Since the blade member is formed by cutting the resin member while feeding in the longitudinal direction, for example, the corner of the lower end wiping portion made of the resin member can be formed with high accuracy. That is, in the case where each blade rubber is molded without being cut as described above, there is a possibility that the corner of the lower end wiping portion made of a resin member may be scratched. Thus, a blade rubber in which the corners of the lower end wiping portion are formed with high accuracy can be obtained. And when cutting as described above, the feed member is brought into contact with the resin member harder than the elastic member and the blade rubber is sent in the longitudinal direction by the feed member, so that the cutting at the time of cutting is suppressed accurately. It becomes possible to do. From these things, wiping performance can be made favorable.

In the blade rubber manufacturing method, a lower end wiping portion made of a resin member at a lower end portion of the wiping portion of each blade rubber is formed by dividing the resin member in a state where the resin members of the pair of blade rubbers are connected to each other. It is preferable.

  According to this method, the resin member is divided so that each blade rubber is formed from a pair of blade rubbers, and the lower end wiping portion made of the resin member at the lower end portion of the wiping portion is also formed on each blade rubber. The blade rubber can be manufactured without waste of the resin member.

In the blade rubber manufacturing method, the pair of blade rubbers are brought into contact with the feed member by contacting the feed member at a position shifted from a dividing position in the resin member in a state where the resin members of the pair of blade rubbers are connected to each other. Is preferably sent in the longitudinal direction.

  According to the method, since the feed member is brought into contact with the position shifted from the dividing position in the resin member and the pair of blade rubbers are sent in the longitudinal direction by the feeding member, the lower end wiping portion formed at the dividing position It is possible to prevent traces and scratches coming into contact with the feeding member at the corners. Thereby, the wiping performance can be further improved.

In the method for manufacturing the blade rubber, the said blade rubber in the feed member while maintaining a fixed position at least the base portion at the guide jig of the pair of the blade rubber as seen from the longitudinal direction of the blade rubber It is preferable to send in the longitudinal direction.

According to this method, and sends the blade rubber at a constant held while feeding member at a position at least the base portion of the guide jig in the longitudinal direction of the pair of blade rubber viewed from the longitudinal direction. Therefore, it is possible to cut accurately by further suppressing the above-described shaking during cutting. Thereby, the wiping performance can be further improved.

In the blade rubber manufacturing method, the resin member in a state where the resin members of the pair of blade rubbers are connected to each other has a protrusion protruding toward the short direction of the blade rubber, and in the separation step, the protrusion It is preferable to feed the blade rubber in the longitudinal direction by the feed member while engaging the strip and the feed member.

According to the method, it has a ridge resin member in a state where the resin member of the pair of the blade rubber is led protrudes toward the lateral direction of the blade rubber, the said feed member and said protrusion engages blade rubber is fed in the longitudinal direction at is while feeding member. Therefore, it is possible to cut accurately by further suppressing the above-described shaking during cutting. Thereby, the wiping performance can be further improved.

In the blade rubber manufacturing method, in the separation step, the blade member is formed by cutting and removing a portion including the protrusions of the resin member while feeding the pair of blade rubbers in the longitudinal direction by the feeding member. It is preferable to do.

According to the method, the lower end wiping portion made of a resin member, for example, is formed in order to form a blade rubber by cutting and removing a portion including the protrusion of the resin member while feeding a pair of blade rubbers in the longitudinal direction by the feed member It is possible to prevent traces and scratches coming into contact with the feed member at the corners. Thereby, the wiping performance can be further improved.

  According to the blade rubber manufacturing method of the present invention, the blade rubber can be accurately fed in the longitudinal direction.

The perspective view for demonstrating the manufacturing method of the blade rubber of one Embodiment. The partial cross section front view for demonstrating the manufacturing method of the blade rubber of one Embodiment. The partial cross section front view for demonstrating the manufacturing method of the blade rubber of another example.

The blade rubber manufacturing method will be described with reference to FIGS.
As shown in FIG. 1, a blade rubber 10 manufactured by the blade rubber manufacturing method of this embodiment includes a base portion 10a that is gripped by gripping claws of a lever assembly (not shown), and a lower portion from the base portion 10a through a neck portion 10b. It has a wiping portion 10c that extends in the direction of the wiping surface when mounted on the vehicle and wipes the wiping surface.

  A backing housing groove 10d is recessed along the longitudinal direction at the center in the vertical direction (left and right direction in FIG. 1) on both sides in the width direction (vertical direction in FIG. 1) of the base 10a. In addition, a holding groove 10e is recessed along the longitudinal direction below the backing housing groove 10d on both sides in the width direction of the base 10a. The backing housing groove 10d accommodates a backing (not shown) made of a metal leaf spring material for imparting rigidity and elasticity to the blade rubber 10. In this state, the tip of the gripping claw of the lever assembly is accommodated in the gripping groove 10e. By fitting the part, the base 10a and the backing are gripped by the gripping claws.

  The wiping portion 10c has a shape that gradually decreases from the top and extends downward from the middle portion with a constant width. The lower end of the wiping portion 10c has an elastic member 12 on the base side of the wiping portion 10c. A lower end wiping portion 14 made of a resin member 13 which is harder and compatible with the elastic member 12 is coupled. The compatibility is a property in which two or more kinds of substances have an affinity for each other and form a solution or a mixture.

  In addition, the elastic member 12 of this embodiment is the most part of the wiping portion 10c in addition to the base portion 10a and the neck portion 10b, and constitutes other than the lower end portion, and is made of a polyester thermoplastic elastomer (TPEE). The lower end wiping portion 14 made of the resin member 13 is coupled to the lower end surface of the elastic member 12 so as to form the lower end portion of the wiping portion 10c, and is made of polyethylene terephthalate (PET).

Next, a method for manufacturing the blade rubber 10 will be described.
As shown in FIG. 2, in the manufacturing method of the blade rubber 10 of the present embodiment, first, the resin member 13 (lower end wiping portion 14) harder than the elastic member 12 is formed in a symmetrical shape so as to be integrally formed (transverse). A pair of blade rubbers 10 whose surface shapes are connected in a plane-symmetrical shape with respect to a surface passing through a cutting position A described later are simultaneously formed. At this stage, since the lower end wiping portions 14 of the blade rubber 10 are connected to form a single resin member 13, the blade rubber 10 is not accurately formed, but as a pair of connected blade rubbers 10. Describe. Further, in the present embodiment, the elastic member 12 is integrally formed with the resin member 13 that has been molded in advance by extrusion molding to perform the coupling.

  Next, as shown in FIG. 1, a pair of blade rubbers 10 connected by a pair of rollers 21 and 22 by contacting a pair of rollers 21 and 22 as feed members against a resin member 13 that is harder than the elastic member 12. The two blade rubbers 10 are formed by cutting the resin member 13 with the vertical blade 23 while feeding in the longitudinal direction.

  At this time, in the present embodiment, each of the lower end wiping portions 14 is divided by dividing the resin member 13 into two by one vertical blade 23 arranged in the subsequent stage of the rollers 21 and 22 (immediately after the feeding direction). Form.

  Further, at this time, the pair of blade rubbers connected by the rollers 21 and 22 by bringing the rollers 21 and 22 into contact with the positions shifted from the dividing position A (see the two-dot chain line in FIG. 2) in the resin member 13. 10 is sent in the longitudinal direction. Specifically, the rollers 21 and 22 of the present embodiment have recesses 21a and 22a formed by reducing the diameter in the center of the outer edge in the axial direction. Then, as shown in FIG. 2, the outer edges of the rollers 21 and 22 are brought into contact (press contact) with the resin member 13 so that the recesses 21 a and 22 a correspond to the dividing position A. The pair of connected blade rubbers 10 are fed in the longitudinal direction by rotationally driving a pair of rollers 21 and 22 sandwiching both sides in the width direction.

  At this time, as shown in FIG. 1, the guide jigs 24 and 25 hold the positions of the paired blade rubbers 10 viewed from the longitudinal direction of at least the base portions 10a at a fixed position (in other words, as shown in FIG. 1). For example, at least the resin member 13 (the lower end wiping portion 14) of the pair of blade rubbers 10 is exposed, while the posture and positional relationship between the base portions 10a are kept constant). A pair of blade rubbers 10 are fed in the longitudinal direction. The guide jigs 24 and 25 of the present embodiment have grooves 24a and 25a into which the upper portions of the base portion 10a, the neck portion 10b and the wiping portion 10c are fitted, and move in the longitudinal direction while maintaining their positions viewed from the longitudinal direction. And is arranged so as to sandwich the rollers 21 and 22.

  Then, the rollers 21 and 22 are brought into contact (pressing contact) with both sides of the resin member 13 in the width direction, and the pair of blade rubbers 10 connected by the rollers 21 and 22 are fixed while being sent in the longitudinal direction. The resin member 13 is cut with the blade 23 to form two blade rubbers 10.

Next, the operation of the above embodiment will be described.
First, as shown in FIG. 2, a pair of blade rubbers 10 connected so that a resin member 13 (lower end wiping portion 14) harder than the elastic member 12 is continuously integrally formed is formed.

  Next, as shown in FIG. 1, the pair of connected blade rubbers 10 have a pair of rollers while the positions of the base portions 10 a and the like viewed from the longitudinal direction are held at fixed positions by the guide jigs 24 and 25. 21 and 22 are sent in the longitudinal direction. At this time, the rollers 21 and 22 are brought into contact (pressing contact) with the resin member 13, and the rollers 21 and 22 are rotationally driven, so that the pair of blade rubbers 10 connected to each other are sent in the longitudinal direction. The lower edge wiping portion 14 is formed by being cut (divided) by the vertical blade 23, and as a result, two blade rubbers 10 are formed.

Next, the characteristic effects of the above embodiment will be described below.
(1) The rollers 21 and 22 are brought into contact with the resin member 13 that is harder than the elastic member 12 and the pair of blade rubbers 10 connected by the rollers 21 and 22 are sent in the longitudinal direction. Compared with the case of sending in contact, more accurate feeding with less deflection is possible.

  Moreover, since the lower end wiping part 10c of the blade rubber 10 manufactured by the same method can be provided with a lower end wiping part 14 made of a resin member 13 that is harder than the elastic member 12 on the base side of the wiping part 10c. The contact width when pressed against the wiping surface can be reduced, and the frictional force during wiping can be reduced.

  (2) A pair of blade rubbers 10 connected so that the resin member 13 (lower end wiping portion 14) is continuously integrally formed is formed at the same time, and the pair of blade rubbers 10 connected by rollers 21 and 22 are long. While being sent in the direction, the resin member 13 is cut to form the blade rubber 10. Therefore, for example, the corners of the lower end wiping portion 14 made of the resin member 13 can be formed with high accuracy. That is, in the case where each blade rubber 10 is molded (individually) without being cut as described above, there is a possibility that the corner of the lower end wiping portion 14 made of the resin member 13 may be scratched. By cutting as described above, the blade rubber 10 in which the corners of the lower end wiping portion 14 are formed with high accuracy can be obtained.

  When cutting as described above, the rollers 21 and 22 are brought into contact with the resin member 13 that is harder than the elastic member 12 and the blade rubber 10 is sent in the longitudinal direction by the rollers 21 and 22. It is possible to cut accurately while suppressing blurring. From these things, wiping performance can be made favorable.

  (3) The blade rubber 10 is formed from the pair of blade rubbers 10 by dividing the resin member 13 into two, and the lower end wiping portion 14 at the lower end portion of the wiping portion 10c of each blade rubber 10 is also each blade. Since it is formed in the rubber 10, the blade rubber 10 can be manufactured without waste of the resin member 13.

  (4) Since the rollers 21 and 22 are brought into contact with the resin member 13 at a position shifted from the dividing position A, and the pair of blade rubbers 10 are fed in the longitudinal direction by the rollers 21 and 22, they are formed at the dividing position A. It is possible to prevent traces and scratches from coming into contact with the rollers 21 and 22 at the corners of the lower end wiping portion 14. Thereby, the wiping performance can be further improved.

  (5) A pair of blade rubbers connected by rollers 21 and 22 while the positions of at least the base portions 10a of the pair of blade rubbers 10 connected from the longitudinal direction are held at fixed positions by the guide jigs 24 and 25. 10 is sent in the longitudinal direction. Therefore, it is possible to cut accurately by further suppressing the above-described shaking during cutting. Thereby, the wiping performance can be further improved.

  (6) The lower end wiping portion 14 made of the resin member 13 harder than the elastic member 12 on the base side of the wiping portion 10c is formed at the lower end portion of the wiping portion 10c of the blade rubber 10. Since it is harder than the elastic member 12 and is formed over the longitudinal direction of the blade rubber 10, it is preferably formed as small as possible to prevent a decrease in the curve following ability of the blade rubber 10 to the wiping surface.

The above embodiment may be modified as follows.
In the above embodiment, the pair of blade rubbers 10 connected by the rollers 21 and 22 are held in the longitudinal direction while holding the positions of the base portions 10a viewed from the longitudinal direction at the fixed positions by the guide jigs 24 and 25. However, the present invention is not limited to this, and the positioning of the pair of blade rubbers 10 connected at the time of sending may be performed by other methods.

  For example, it may be changed as shown in FIG. In this example, a waste material portion 32 having a step portion 31 is provided at the center of the resin member 13 (between the lower end wiping portions 14), and rollers 33 and 34 as feed members are brought into contact with the resin member 13 so that the roller The blade rubber 10 is formed by cutting and removing the waste material portion 32 of the resin member 13 while feeding a pair of blade rubbers 10 connected at 33 and 34 in the longitudinal direction. The step portion 31 is formed by making the width (the vertical width in FIG. 3) larger than the lower end wiping portion 14. The rollers 33 and 34 have step engaging portions 33a and 34a formed by increasing the diameter on both sides in the axial direction of the outer edges. Then, the step engaging portions 33a and 34a are arranged in the direction perpendicular to the feeding direction (the direction orthogonal to the paper surface in FIG. 3) with the step engaging portions 33a and 34a sandwiched between the step portions 31 and 34a. The pair of blade rubbers 10 connected to each other can be sent in the longitudinal direction by rotating the rollers 33 and 34 while restricting movement in the same direction by engaging (sliding contact) with each other. In this example, the resin member 13 is moved at the cutting position B where the waste material portion 32 is cut and removed by a pair of vertical blades (not shown) arranged at the subsequent stage of the rollers 33 and 34 (immediately after the feeding direction). The blade rubber 10 is formed by cutting.

Even if it does in this way, the effect similar to the effect (1) of the said embodiment and (2) can be acquired.
Further, a step portion 31 that can be engaged with the resin member 13 in a direction orthogonal to the feeding direction is provided, and the rollers 33 and 34 are engaged with the step portion 31 and the step engaging portions 33a and 34a of the rollers 33 and 34. A pair of blade rubbers 10 connected in the above are sent in the longitudinal direction. Therefore, it is possible to cut accurately by further suppressing the above-described shaking during cutting. Thereby, the wiping performance can be further improved.

  Further, a waste material portion 32 having the step portion 31 is provided in the center of the resin member 13 (between the lower end wiping portion 14), and a pair of blade rubbers 10 connected by rollers 33 and 34 are fed in the longitudinal direction. The waste rubber portion 32 of the resin member 13 is cut and removed to form the blade rubber 10. That is, only the waste material part 32 to be discarded is in contact with the rollers 33 and 34, and the rollers 33 and 34 can be prevented from coming into contact with the blade rubber 10 which is finally the product. Therefore, for example, it is possible to prevent traces and scratches coming into contact with the rollers 33 and 34 at the corners of the lower end wiping portion 14 made of the resin member 13. Thereby, the wiping performance can be further improved.

  In the above embodiment, a pair of connected blade rubbers 10 are formed at the same time, and the resin member 13 is cut while being fed by the rollers 21 and 22 to form the two blade rubbers 10. However, the present invention is not limited to this. When the blade rubber 10 is fed in another process, the feeding member (rollers 21 and 22) may be brought into contact with the resin member 13 and sent. For example, the rollers 21 and 22 are brought into contact with the lower end wiping portion 14 made of the resin member 13 of the blade rubber 10 which is a single product (not connected), and the blade rubber 10 is fed in the longitudinal direction by the rollers 21 and 22. Any other processing such as application of another drug may be performed.

  In the above embodiment, the rollers 21 and 22 are brought into contact with the position shifted from the dividing position A in the resin member 13 and the blade rubber 10 is sent in the longitudinal direction by the rollers 21 and 22. However, the present invention is not limited to this. Instead, the rollers 21 and 22 may be brought into contact with the dividing position A and sent.

  In the above embodiment, the elastic member 12 is made of a polyester-based thermoplastic elastomer (TPEE), and the resin member 13 (lower end wiping portion 14) is made of polyethylene terephthalate (PET), which are bonded to each other. The material may be changed. In this case, it is preferable to change the elastic member and the resin member to materials compatible with each other. More preferably, the elastic member and the resin member are made of a similar material such as ester or olefin. Further, the resin member may have an engaging portion that is embedded in the elastic member and engages (elastically) the elastic member in the vertical direction.

  DESCRIPTION OF SYMBOLS 10 ... Blade rubber, 10a ... Base, 10c ... Wiping part, 12 ... Elastic member, 13 ... Resin member, 14 ... Lower end wiping part, 21, 22, 33, 34 ... Roller (feeding member), 24, 25 ... Guidance Tool 31 ... Step part 32 ... Waste material part A ... Dividing position.

Claims (6)

Method for producing elongated blade rubber having a hard resin member than the base portion side of the elastic member of the wiping portion to the lower end of the wiping portion as well as have a wiping unit for wiping the wiping surface extends from the base downward Because
A molding step of molding the pair of blade rubbers so as to be integrated with each other in an opposing state in which both resin members are connected to each other;
A separation step you forming the blade rubber by cutting while seeking the resin member feeding in a longitudinal direction of the blade rubber in the resin member to feed said transmission Ri member is brought into contact with the member
A method for producing a blade rubber, comprising: It is a manufacturing method of the blade rubber according to claim 1 ,
The lower end wiping part which consists of a resin member in the lower end part of the wiping part of each blade rubber is formed by dividing the resin member in the state where the resin members of the pair of blade rubbers are connected to each other . Production method. It is a manufacturing method of the blade rubber according to claim 2 ,
The pair of blade rubbers are fed in the longitudinal direction with the feed member brought into contact with the position shifted from the dividing position in the resin member in a state where the resin members of the pair of blade rubbers are connected to each other. A method for producing a blade rubber, which is characterized. It is a manufacturing method of the blade rubber according to claim 2 or 3 ,
And wherein the sending the blade rubber in the blade rubber in the longitudinal direction from seeing the while maintaining a fixed position in the guide jig of at least each base portion of the pair of the blade rubber feed member in the longitudinal direction A method of manufacturing a blade rubber. It is a manufacturing method of the blade rubber according to claim 1 ,
The resin member in a state where the resin members of the pair of blade rubbers are connected to each other has a ridge that protrudes toward the short direction of the blade rubber,
In the separation step, the blade rubber is fed in the longitudinal direction by the feed member while engaging the protrusion and the feed member. It is a manufacturing method of the blade rubber according to claim 5 ,
In the separating step, the blade rubber is formed by cutting and removing a portion including the protrusion of the resin member while feeding the pair of blade rubbers in the longitudinal direction by the feeding member. Manufacturing method.