Wipers for machine tools

Abstract

To provide a wiper for machine tools that can scrape off foreign matter from sliding surfaces even when usage conditions change. [Solution] The machine tool wiper 10 includes a connecting portion 61 made of an elastic material that joins a first mounting portion 21 and a second mounting portion 41. The machine tool wiper 10 is configured such that a first connecting end 63a is provided at a position on the other end 21b side of the first mounting portion 21, relative to an extension line extending from one side 25 of the second mounting portion 41, and a second connecting end 63b is provided at a position on the other end 41b side of the second mounting portion 41, relative to an extension line extending from one side 25 of the first mounting portion 21.

Description

Technical Field

[0001] The present invention relates to a wiper for a machine tool.

Background Art

[0002] In a machine tool, a wiper for a machine tool is attached to prevent foreign matters such as chips (hereinafter referred to as swarf) and cutting fluid generated during machining from entering the machine interior from the gap portion. The wiper for a machine tool may be used not only for a single plane (sliding surface) but also for a corner portion having two adjacent planes (sliding surfaces) extending in different directions.

[0003] As a wiper for a machine tool that scrapes off foreign matters adhering to a pair of adjacent sliding surfaces constituting a corner portion, for example, a wiper for a machine tool as shown in Patent Document 1 is known. The wiper for a machine tool disclosed in Patent Document 1 has a first wiper portion and a second wiper portion joined and integrated at a right angle. The wiper for a machine tool presses the first lip portion of the first wiper portion and the second lip portion of the second wiper portion against a right-angled corner portion, respectively, and causes the first lip portion and the second lip portion to follow along the ridge line of the corner portion, so that foreign matters adhering to the corner portion can be scraped off by the first lip portion and the second lip portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, one possible use of such machine tool wipers is to connect multiple machine tool wipers to match the shape of the sliding surface by joining another straight machine tool wiper to the end of a machine tool wiper in which the first wiper section and the second wiper section are integrated at a predetermined angle, or by joining the ends of straight machine tool wipers together. Therefore, when using machine tool wipers, for example, if the angle of the corner section changes, there is a possibility that the machine tool wiper may not be able to scrape off foreign matter, or when the ends of multiple machine tool wipers are joined together, gaps may be created between the ends of the machine tool wipers, and there is a possibility that foreign matter may not be scraped off at the gaps. Accordingly, it is desirable that the machine tool wiper be able to scrape off foreign matter from the sliding surface even when the usage conditions change, such as when the angle of the corner section changes or when it becomes necessary to join the ends of machine tool wipers together.

[0006] This invention has been made in view of the above problems, and aims to provide a wiper for machine tools that can scrape off foreign matter from the sliding surface even when the usage conditions change. [Means for solving the problem]

[0007] The machine tool wiper according to the present invention is a machine tool wiper that scrapes off foreign matter adhering to a pair of adjacent sliding surfaces constituting a corner portion, and comprises: a first mounting portion and a first wiper portion having a first lip portion provided on one side of the first mounting portion and in close contact with one of the sliding surfaces; a second mounting portion and a second wiper portion having a second lip portion provided on one side of the second mounting portion and in close contact with the other sliding surface; and a connecting portion that joins one end of the first mounting portion and one end of the second mounting portion, and arranges the first wiper portion and the second wiper portion at a predetermined angle, wherein the connecting portion is made of an elastic material, the first connecting end of the connecting portion that joins with one end of the first mounting portion is located on the other end side of the first mounting portion than the extension line extending from one side of the second mounting portion, and the second connecting end of the connecting portion that joins with one end of the second mounting portion is located on the other end side of the second mounting portion than the extension line extending from one side of the first mounting portion.

[0008] Furthermore, another machine tool wiper according to the present invention is a machine tool wiper for scraping off foreign matter adhering to a sliding surface, comprising a mounting portion and a lip portion provided on one side of the mounting portion and in close contact with the sliding surface, wherein one end and / or the other end of the mounting portion are formed of an elastic absorber that elastically absorbs displacement when the ends of other machine tool wipers are joined together. [Effects of the Invention]

[0009] According to the present invention, by positioning the first and second connecting ends of the connecting portion at a location on the other end side of the first and second mounting portions, respectively, relative to the extension lines extending from one side of the second and first mounting portions, the formation area of ​​the connecting portion can be widened, making the connecting portion more easily deformable. As a result, in machine tool wipers, the angles of the first and second wiper portions can be displaced by the connecting portion to match corners of various angles or the positions of the ends of other machine tool wipers being joined. Therefore, in machine tool wipers, the occurrence of gaps between the sliding surface and the wiper, and between the wiper and the ends of other machine tool wipers can be suppressed, so that foreign matter on the sliding surface can be scraped off even if the angle of the corner changes or if it becomes necessary to join the ends of other machine tool wipers, thus changing the usage conditions.

[0010] Furthermore, according to another machine tool wiper of the present invention, the elastic absorber can suppress the occurrence of gaps between the end of the wiper and the end of the other machine tool wiper, so that foreign matter on the sliding surface can be scraped off even if the usage situation changes, such as when it becomes necessary to connect it with the end of the other machine tool wiper. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing the configuration of a machine tool wiper according to the first embodiment. [Figure 2A] Figure 1 is a front view showing the front configuration of a machine tool wiper as seen from direction F. [Figure 2B] This is a magnified detail view focusing on the connecting part of the machine tool wiper shown in Figure 2A. [Figure 2C] This is a front view showing the connecting part of a machine tool wiper according to a modified example. [Figure 2D] This is a front view showing the connecting part of a machine tool wiper according to a modified example. [Figure 3] This is a cross-sectional view showing the cross-sectional configuration of the first mounting portion along line AA in Figure 2A. [Figure 4]It is a cross-sectional view showing the cross-sectional configuration of the first wiper part on the B-B line of FIG. 2A. [Figure 5] It is a front view showing the state when the wiper for machine tools according to the first embodiment is pressed against the corner part. [Figure 6] 6A is a front view showing the front configuration of a wiper for machine tools in which the front view shape of the connecting part is substantially triangular, 6B is a front view showing the front configuration of a wiper for machine tools provided without an elastic absorber, and 6C is a front view showing the front configuration of a wiper for machine tools according to a modification of the first embodiment. [Figure 7] 7A is a front view showing the front configuration of a wiper for machine tools configured such that the tips of the first lip part and the second lip part are smoothly connected by a curved part, 7B is a front view showing the front configuration of a wiper for machine tools in which the angle α of the inner corner of the first wiper part and the second wiper part is selected as an obtuse angle, and 7C is a front view showing the front configuration of a wiper for machine tools in which the angle α of the inner corner of the first wiper part and the second wiper part is selected as an acute angle. [[ID=eleven]] [Figure 8] It is a front view showing a wiper for machine tools according to a modification. [Figure 9] It is a cross-sectional view showing the cross-sectional configuration of the first wiper part according to a modification of the first embodiment. [Figure 10] It is a front view showing the front configuration of a wiper for machine tools according to the second embodiment. [Figure 11] It is a front view showing the front configuration of a wiper for machine tools according to a modification of the second embodiment.

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described. In the following description, the same components as those already described will be denoted by the same reference numerals and the description thereof will be omitted.

[0013] (First Embodiment) (1) Configuration of Wiper for Machine Tools Figure 1 is a perspective view showing the configuration of the machine tool wiper 10 according to this embodiment, and Figure 2A is a front view showing the configuration of the machine tool wiper 10 as seen from direction F in Figure 1. The machine tool wiper 10 according to this embodiment is attached to a machine tool. The machine tool wiper 10 is pressed against two adjacent sliding surfaces that constitute a corner portion (not shown) and scrapes off foreign matter such as chips and cutting fluid adhering to the sliding surfaces. As shown in Figure 1, the machine tool wiper 10 comprises a first wiper portion 11 that slides along one of the adjacent sliding surfaces of the corner portion, a second wiper portion 12 that slides along the other sliding surface, and a connecting portion 61 that connects one end of the first wiper portion 11 and the second wiper portion 12. The ends of the first wiper portion 11 and the second wiper portion 12 are connected by the connecting portion 61 at an angle α [°] corresponding to the corner portion against which the first wiper portion 11 and the second wiper portion 12 are pressed.

[0014] The machine tool wiper 10, attached to a machine tool, moves relative to a corner (not shown), causing the first wiper section 11 to slide on one sliding surface of the corner and the second wiper section 12 to slide on the other sliding surface, scraping off foreign matter adhering to each sliding surface. The first wiper section 11 comprises a first mounting section 21 and a first lip section 31 provided on one side 25 extending in the longitudinal direction of the first mounting section 21. The second wiper section 12 comprises a second mounting section 41 and a second lip section 51 provided on one side 25 extending in the longitudinal direction of the second mounting section 41. One end 31a of the first lip portion 31 and one end 51a of the second lip portion 51 are joined together, and one end 21a of the first mounting portion 21 on the same side as one end 31a of the first lip portion 31 and one end 41a of the second mounting portion 41 on the same side as one end 51a of the second lip portion 51 are joined together via a connecting portion 61.

[0015] The first lip portion 31 and the second lip portion 51 are made of an elastic member. The first lip portion 31 and the second lip portion 51 are joined and integrated at their ends 31a and 51a by a joint portion 62. The joint portion 62 extends linearly from the corner portion 61a of the connecting portion 61 (see FIG. 2A) toward the lip tip portion 33 side of the wiper 10 for a machine tool.

[0016] Here, as shown in FIG. 2A, for the first wiper portion 11 and the second wiper portion 12, the inner angle centered on the joint portion 62 is selected to be an angle α according to the corner portion for scraping off foreign matter. In the present embodiment, an example is shown in which the inner angle α of the first wiper portion 11 and the second wiper portion 12 is selected to be 90 [°]. In a front view seen from the F direction in FIG. 1, the first lip portion 31 and the second lip portion 51 are arranged in an L shape and are symmetrically arranged about the C-C line (angle 1 / 2α [°] line).

[0017] FIG. 3 is a cross-sectional view showing the cross-sectional configuration of the first wiper portion 11 taken along the A-A line in FIG. 2A. Since the first wiper portion 11 and the second wiper portion 12 have the same configuration, the following description focuses on the first wiper portion 11, and the description of the second wiper portion 12 is omitted to avoid duplication of explanation.

[0018] The first mounting portion 21 and the second mounting portion 41 have the same configuration and are attached to a machine tool, respectively. The first mounting portion 21 and the second mounting portion 41 each include a lip connecting portion 22 and a mounting portion substrate 23 laminated on one side of the lip connecting portion 22. The lip connecting portion 22 is made of the same elastic material as the first lip portion 31 and the second lip portion 51 and is formed in a substantially rectangular plate shape. Specific examples of elastic materials include nitrile rubber (NBR), urethane rubber, fluororubber, hydrogenated nitrile rubber (H-NBR) and carboxylated nitrile rubber (X-NBR), natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, ethylene-propylene rubber, butyl rubber, chloroprene rubber, acrylic rubber, epichlorohydrin rubber, chlorinated polyethylene rubber, silicone rubber, chlorosulfonated polyethylene rubber, polybutadiene rubber, polysulfurized rubber, resin, thermoplastic elastomer, and the like. Examples of the thermoplastic elastomers mentioned above include polyester elastomers, polyamide elastomers, polyolefin elastomers, and thermoplastic polyurethane elastomers.

[0019] The lip connecting portion 22 has multiple (for example, two) through holes 24 that penetrate through its thickness, arranged along its longitudinal direction. The lip connecting portion 22 of the first mounting portion 21 has a first lip portion 31 made of an elastic material integrally molded onto one side 25 extending in the longitudinal direction so as to bend relative to the lip connecting portion 22. The lip connecting portion 22 of the second mounting portion 41 has a second lip portion 51 made of an elastic material integrally molded onto one side 25 extending in the longitudinal direction so as to bend relative to the lip connecting portion 22.

[0020] As shown in Figures 1 and 3, the mounting base plate 23 is made of, for example, a metal material and is formed in the shape of a rectangular plate. Similar to the lip connecting portion 22, the mounting base plate 23 also has multiple through-holes 24 extending through its thickness, arranged along its longitudinal direction. The mounting base plate 23 is positioned within the base plate mounting portion 22a of the lip connecting portion 22 such that the through-holes 24 communicate with the through-holes 24 of the lip connecting portion 22. The first mounting portion 21 and the second mounting portion 41 are fixed to the machine tool by bolts (not shown) inserted through the through-holes 24.

[0021] The lip connecting section 22 comprises a substrate mounting section 22a, a short-side frame section 22c, a first long-side frame section 22d, a second long-side frame section 22e, and an elastic absorber 70, all of which are integrally molded. The lip connecting section 22 has a rectangular recess on its front surface due to the substrate mounting section 22a, and the mounting section substrate 23 is provided within the recessed area of ​​the substrate mounting section 22a. The short-side frame section 22c, the first long-side frame section 22d, the second long-side frame section 22e, and the elastic absorber 70 are arranged to surround the outer circumference of all four sides of the mounting section substrate 23. The short-side frame section 22c is provided at one end of the substrate mounting section 22a. The elastic absorber 70 is provided at the other end of the substrate mounting portion 22a opposite to one end. The first long-side frame portion 22d is provided along the side of the substrate mounting portion 22a that extends in the longitudinal direction and is connected to the first lip portion 31. The second long-side frame portion 22e extends in the longitudinal direction of the substrate mounting portion 22a and is provided along the side opposite to the first long-side frame portion 22d. The side of the first long-side frame portion 22d that forms the boundary with the first lip portion 31 becomes one side 25 of the first mounting portion 21. The elastic absorber 70 may be made of an elastic material of the same quality as the first lip portion 31 and the second lip portion 51 described above, or of an elastic material made of a foam containing closed or open cells, an elastic material softer than the elastic material constituting the lip connecting portion 22 excluding the elastic absorber 70, or a spring-like elastic material.

[0022] In this embodiment, one end 21a of the first mounting portion 21 is formed by a short-side frame portion 22c made of an elastic material, and the short-side frame portion 22c is integrally molded with the connecting portion 61. The short-side frame portion 22c is in the shape of a rectangular parallelepiped, and its longitudinal direction is arranged along the width direction of the first mounting portion 21. The short-side frame portion 22c is formed to be thicker than the thickness of the substrate mounting portion 22a, and is formed to be thick enough to abut the end of the mounting portion substrate 23. In this embodiment, the thickness of the mounting portion substrate 23 when it is placed on the substrate mounting portion 22a and the thickness of the short-side frame portion 22c are formed to be approximately the same, and the surface of the mounting portion substrate 23 and the surface of the short-side frame portion 22c are formed to be flush. In this specification, "approximately the same" and "flush" include not only cases where they are perfectly aligned, but also cases where there is a deviation of a degree equivalent to manufacturing tolerance.

[0023] In this embodiment, the other end 21b of the first mounting portion 21 is formed by an elastic absorber 70 made of an elastic material. The elastic absorber 70 is in the shape of a rectangular parallelepiped, and its longitudinal direction is arranged along the width direction of the first mounting portion 21. The elastic absorber 70 is formed to be thicker than the thickness of the substrate mounting portion 22a and to be thick enough to abut the end of the mounting portion substrate 23. In this embodiment, the thickness of the elastic absorber 70 is formed to be approximately the same as the thickness of the mounting portion substrate 23 when it is placed on the substrate mounting portion 22a, and the surface of the mounting portion substrate 23 and the surface of the elastic absorber 70 are formed to be flush.

[0024] The elastic absorber 70 is provided to elastically absorb the displacement between the end of another machine tool wiper and the elastic absorber 70 when the end of the other machine tool wiper is brought into contact with the elastic absorber 70 and joined together. Preferably, the depth dimension of the elastic absorber 70 in the longitudinal direction along one side 25 of the first mounting portion 21 is 0.5 [mm] or more and 20 [mm] or less. If it is less than 0.5 [mm], the depth dimension of the elastic absorber 70 is not large enough, and it may be difficult to elastically absorb the displacement between the end of the other machine tool wiper joined to the elastic absorber 70. If it exceeds 20 [mm], the ends of the first wiper portion 11 and the second wiper portion 12 may be elastically deformed by external force, so it is preferable that it be 20 [mm] or less.

[0025] In this embodiment, the other end 41b of the second mounting portion 41 is also formed of an elastic absorber 70, similar to the first mounting portion 21, so as to elastically absorb the displacement between it and the end of another machine tool wiper when the end of that machine tool wiper is joined together. In this embodiment, the machine tool wiper 10 has been described in which the other ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 are each formed of an elastic absorber 70. However, the present invention is not limited to this, and only one of the other ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 may be formed of an elastic absorber 70. In this case, for example, the remaining other end 41b that is not formed of an elastic absorber 70 may have an exposed end of the mounting portion substrate 23, or it may have a thin elastic coating of, for example, 0.2 [mm] or less, which is not thick enough to elastically absorb the displacement between it and the end of another machine tool wiper.

[0026] The first long-side frame portion 22d and the second long-side frame portion 22e are rectangular parallelepipeds, and their longitudinal directions are aligned with the longitudinal direction of the first mounting portion 21. The first long-side frame portion 22d and the second long-side frame portion 22e are provided so as to connect the opposing short-side frame portion 22c and the elastic absorber 70, and the first long-side frame portion 22d, the second long-side frame portion 22e, the short-side frame portion 22c and the elastic absorber 70 are arranged in a rectangular shape so as to surround the outer circumference of the four sides of the substrate mounting portion 22a. The first long-side frame portion 22d and the second long-side frame portion 22e are formed to be thicker than the thickness of the substrate mounting portion 22a, and are formed to a thickness that abuts against the side portion extending along the longitudinal direction of the mounting portion substrate 23. In this embodiment, the thickness of the mounting substrate 23 when it is placed on the substrate mounting portion 22a is formed to be approximately the same as the thickness of the first long side frame portion 22d and the second long side frame portion 22e, and the surface of the mounting substrate 23 and the surfaces of the first long side frame portion 22d and the second long side frame portion 22e are formed to be flush.

[0027] The connecting portion 61 is formed from an elastic member of the same quality as the lip connecting portion 22. Here, Figure 2B is an enlarged detail view of the machine tool wiper 10 shown in Figure 2A, focusing on the connecting portion. As shown in Figure 2B, the connecting portion 61 includes a first connecting end 63a that joins with the short side frame portion 22c, which is one end 21a of the first mounting portion 21, and a second connecting end 63b that joins with the short side frame portion 22c, which is one end 41a of the second mounting portion 41. Between the first connecting end 63a and the second connecting end 63b, there is a connecting recess 61c in which the corner portion 61a is recessed toward the center point O of the connecting portion 61 when viewed from the front. As shown in Figure 2B, for example, a V-shaped or L-shaped connecting recess 61c with a recessed corner portion 61a is provided between the first connecting end 63a and the second connecting end 63b. The first connecting end 63a and the second connecting end 63b are connected by a connecting recess 61c, and are adjacent at a predetermined angle with the connecting recess 61c in between. In the connecting recess 61c, the first long side frame portion 22d of the first mounting portion 21 and the first long side frame portion 22d of the second mounting portion 41 each extend beyond the short side frame portion 22c to the corner portion 61a, and the first long side frame portions 22d of the first mounting portion 21 and the second mounting portion 41 are joined and integrated at the corner portion 61a.

[0028] In Figure 2B, a V-shaped or L-shaped connecting recess 61c with a recessed corner 61a is provided, but the design is not limited to this. Figures 2C and 2D are front views showing the connecting portion of a machine tool wiper 10 according to a modified example. As shown in Figure 2C, the connecting portion 61x may be configured to have a connecting recess 61cx with a recessed corner 61ax that is rounded to a circular or elliptical shape. Also, as shown in Figure 2D, the connecting portion 61y may be provided to have a connecting recess 61cy with a recessed corner 61ay that is rounded to a circular or elliptical shape, and the end of the connecting recess 61cy may also be rounded.

[0029] The connecting portion 61 is preferably formed with a thickness dimension less than or equal to the thickness dimension of the first mounting portion 21 and the second mounting portion 41, and more preferably, is formed in the shape of a thin plate (for example, a thin rectangular plate) that is thinner than the thickness dimension of the first mounting portion 21 and the second mounting portion 41. In this embodiment, it is desirable that the thickness dimension of the connecting portion 61 is less than or equal to the thickness dimension of the thin substrate mounting portion 22a of the lip connecting portion 22. In this embodiment, since the connecting portion 61 is formed of an elastic member, even if the angle of the corner portion changes or the position of the end of the other machine tool wiper to be connected changes, the connecting portion 61 will elastically deform accordingly, and the angles of the first wiper portion 11 and the second wiper portion 12 can be changed to match the angle of the corner portion or the position of the end of the other machine tool wiper. If the thickness of the connecting portion 61 is thin, it becomes even easier to match it to the position of the end of the other machine tool wiper.

[0030] In addition, as shown in Figure 2B, the first connecting end 63a of the connecting portion 61, which joins with the short-side frame portion 22c, which is one end 21a of the first mounting portion 21, is positioned on the other end 21b side of the first mounting portion 21, rather than on the extension line L2 extending from one side 25 of the second mounting portion 41. As a result, the connecting portion 61 has a region in which the width dimension W1 of the connecting portion 61 in the width direction WR2 of the second mounting portion 41 (i.e., the width direction WR2 of the second mounting portion 41 perpendicular to the longitudinal direction DR2 on which one side 25 of the second mounting portion 41 extends) is larger than the width dimension W2 of the width direction WR2 of the second mounting portion 41 (in Figure 2B, a region of W1 × W4 excluding the region in which the connecting recess 61c is formed). Furthermore, it is preferable that the first connecting end 63a of the connecting portion 61 is positioned so as not to exceed the extension line L4 that extends along the longitudinal direction DR2 from the lip tip 33a of the second lip portion 51 toward the other end 21b (Figure 2A) of the first mounting portion 21.

[0031] Furthermore, the second connecting end 63b of the connecting portion 61, which joins with the short-side frame portion 22c, which is the end 41a of the second mounting portion 41, is positioned on the other end 41b side of the second mounting portion 41, relative to the extension line L1 extending from one side 25 of the first mounting portion 21. As a result, the connecting portion 61 has a region in which the width dimension W3 of the connecting portion 61 in the width direction WR1 of the first mounting portion 21 (i.e., the width direction WR1 of the first mounting portion 21 perpendicular to the longitudinal direction DR1 extending from one side 25 of the first mounting portion 21) is larger than the width dimension W4 of the width direction WR1 of the first mounting portion 21 (in Figure 2B, a region of W3 × W2 excluding the region in which the connecting recess 61c is formed). Furthermore, it is preferable that the second connecting end 63b of the connecting portion 61 is positioned so as not to exceed the extension line L3 that extends along the longitudinal direction DR1 from the lip tip 33a of the first lip portion 31 toward the other end 41b (Figure 2A) of the second mounting portion 41.

[0032] With the above configuration, one end 21a of the first mounting portion 21 is positioned spaced apart from the extension line L2 of one side 25 of the second mounting portion 41 towards the other end 21b of the first mounting portion 21. Similarly, one end 41a of the second mounting portion 41 is positioned spaced apart from the extension line L1 of one side 25 of the first mounting portion 21 towards the other end 41b of the second mounting portion 41. Thus, in this embodiment, the positions of the first connecting end 63a and the second connecting end 63b of the connecting portion 61 are set further toward the other ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 than the extension lines L2, L1 extending from one side 25 of the second mounting portion 41 and the first mounting portion 21, respectively, thereby expanding the formation area of ​​the connecting portion 61. As a result, in this embodiment, even if the angle of the corner portion changes, or if the position of the end of the other machine tool wiper being connected changes, the wider formation area of ​​the connecting portion 61 makes it easier for the connecting portion 61 to elastically deform, allowing the angles of the first wiper portion 11 and the second wiper portion 12 to be further adjusted to match the angle of the corner portion or the position of the end of the other machine tool wiper.

[0033] Here, Figure 4 is a cross-sectional view showing the cross-sectional configuration of the first wiper section 11 along line BB in Figure 2A. The lip connecting section 22 of the first mounting section 21 has a thin-walled substrate mounting section 22a with a thickness of approximately 0.05 to 10 [mm], and the end of the first lip section 31 is integrally molded to one side 25 that extends in the longitudinal direction of the thick-walled section. The first lip section 31 includes a bent section 27, an extended section 32, and a lip tip section 33 that protrude from one side 25 of the thick-walled section of the lip connecting section 22. The bent section 27 bends from one side 25 of the lip connecting section 22 toward the side where the mounting section substrate 23 of the lip connecting section 22 is provided, with the bend point being one side 25.

[0034] The extension portion 32 is integrally molded with the end of the bent portion 27 and is bent at a larger angle than the bent portion 27 toward the surface where the mounting base plate 23 is provided. The extension portion 32 protrudes obliquely at an angle θ with respect to the surface direction of the lip connecting portion 22. Near the boundary on the inner corner side between the bent portion 27 and the extension portion 32, a groove 26 is provided along the boundary line so that the extension portion 32 can bend inward in a roughly V-shape. As a result, the thickness of the boundary between the bent portion 27 and the extension portion 32 is thinner than other parts, making it easier for the extension portion 32 to bend toward the groove 26 side and more difficult to bend toward the opposite side.

[0035] The tip of the extended portion 32 has a lip tip portion 33. The lip tip portion 33 contacts the sliding surface that scrapes off foreign matter and slides on the sliding surface. The lip tip portion 33 is formed in a wedge shape in cross-section by cutting the tip of the extended portion 32. The lip tip portion 33 has a pointed tip corner portion 33a on the inner corner side (the inner side that contacts the sliding surface) formed by the first wiper portion 11 and the second wiper portion 12. The lip tip portion 33 also has an opposing corner portion 33b on the outside that extends opposite to the tip corner portion 33a. In this case, the lip tip portion 33 slides by being pressed against the sliding surface of the corner portion with the pointed tip corner portion 33a, or the portion of the lip tip portion 33a that extends from the tip corner portion 33a to a part of the back surface 32b.

[0036] (2) Manufacturing method Next, the manufacturing method of the machine tool wiper 10 described above will be explained. The machine tool wiper 10 is manufactured by molding an elastic material using a mold of a predetermined shape, and integrating the lip connecting portion 22 of the first mounting portion 21, the first lip portion 31, the lip connecting portion 22 of the second mounting portion 41, the second lip portion 51, and the connecting portion 61. By molding with a mold in this way, a connecting portion 61 with a wide formation area can be formed, and the respective ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 can be formed with an elastic absorber 70.

[0037] The mounting base plates 23 provided on the first mounting portion 21 and the second mounting portion 41 are prepared to match the size of the base plate mounting portion 22a of the lip connecting portion 22. The mounting base plates 23 can be fixed to the surface of the base plate mounting portion 22a of the lip connecting portion 22 by any method to obtain the machine tool wiper 10.

[0038] (3) Action and Effects As described above, the machine tool wiper 10 comprises a first wiper section 11 having a first mounting section 21 and a first lip section 31, and a second wiper section 12 having a second mounting section 41 and a second lip section 51. One end 31a of the first lip section 31 and one end 51a of the second lip section 51 are joined together, and one end 21a of the first mounting section 21 and one end 41a of the second mounting section 41 are joined together via a connecting section 61, with the first wiper section 11 and the second wiper section 12 arranged at a predetermined angle α. Here, the connecting portion 61 is made of an elastic material, and in a front view, the first connecting end 63a is provided at a position on the other end 21b side of the first mounting portion 21 that is further than the extension line L2 extending from one side 25 of the second mounting portion 41, and the second connecting end 63b is provided at a position on the other end 41b side of the second mounting portion 41 that is further than the extension line L1 extending from one side 25 of the first mounting portion 21.

[0039] Thus, in the machine tool wiper 10, by positioning the first connecting end 63a and the second connecting end 63b of the connecting portion 61 at a position closer to the other end 21b, 41b of the first mounting portion 21 and the second mounting portion 41 than the extension lines L2, L1 extending from one side of the second mounting portion 41 and the first mounting portion 21, respectively, the formation area of ​​the connecting portion 61 can be widened, and the connecting portion 61 becomes more easily deformed.

[0040] As a result, as shown in Figure 5, the machine tool wiper 10 can change the angles of the first lip portion 31 and the second lip portion 51 to match the angles of the adjacent sliding surfaces 101 and 102 that constitute the corner portion 100 by the elastic deformation of the connecting portion 61, and can slide the first lip portion 31 and the second lip portion 51 in close contact with the sliding surfaces 101 and 102. Therefore, the machine tool wiper 10 can scrape off foreign matter adhering to the sliding surfaces 101 and 102 at predetermined angles that constitute the corner portion 100 with the tip corners 33a of the first lip portion 31 and the second lip portion 51, respectively.

[0041] As described above, the machine tool wiper 10 has a configuration in which the connecting portion 61 is easily deformable, so the angles of the first wiper portion 11 and the second wiper portion 12 can be displaced by the connecting portion 61 to match the corners of various angles or the positions of the ends of other machine tool wipers that are connected.Therefore, the machine tool wiper 10 can suppress the occurrence of gaps between the sliding surfaces 101 and 102 and between the machine tool wiper 100 and the ends of other machine tool wipers, so that foreign matter on the sliding surfaces 101 and 102 can be scraped off even if the angle of the corner portion 100 changes or if it becomes necessary to connect the ends of other machine tool wipers and the usage situation changes.

[0042] Furthermore, the other end 21b of the first mounting portion 21 and the other end 41b of the second mounting portion 41 are formed by an elastic absorber 70 that elastically absorbs displacement when the ends of other machine tool wipers are joined together. As a result, the machine tool wiper 10 can suppress the occurrence of gaps between itself and the ends of other machine tool wipers by the elastic absorber 70, so that foreign matter on the sliding surface can be scraped off even if the usage situation changes, such as when it becomes necessary to join it with the ends of other machine tool wipers.

[0043] (4) Variations The present invention is not limited to the embodiments described above, but includes the following modifications to the extent that the objectives of the present invention can be achieved.

[0044] In the embodiments described above, a connecting portion 61 having a substantially rectangular shape in front view was described as the connecting portion, but the present invention is not limited thereto. For example, as shown in 6A of Figure 6, a connecting portion 161 having a substantially triangular shape in front view may also be used. In this case, the connecting portion 161 has an inclined side 161b that linearly connects the outer tip of the first connecting end portion 63a that joins with the short side frame portion 22c of the first mounting portion 21 and the outer tip of the second connecting end portion 63b that joins with the short side frame portion 22c of the second mounting portion 41. Even with such a machine tool wiper 111, the same effects as in the embodiments described above can be achieved.

[0045] Furthermore, although the above-described embodiment mentions a case where both the other ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 are formed from the elastic absorber 70, the present invention is not limited to this. For example, as shown in 6B of Figure 6, other machine tool wipers 112 may have a configuration in which both the other ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 are not formed from the elastic absorber 70, leaving the end of the mounting portion substrate 23 exposed, or a configuration in which a coating generated during molding is formed on the end of the mounting portion substrate 23.

[0046] Furthermore, although the above-described embodiment mentions a case where one end 21a, 41a of the first mounting portion 21 and the second mounting portion 41 is formed by the short-side frame portion 22c, the present invention is not limited to this. For example, as shown in 7A of Figure 7, other machine tool wipers 113 may have a configuration in which one end 21a, 41a of the first mounting portion 21 and the second mounting portion 41 is not formed by the short-side frame portion 22c, leaving the end of the mounting portion substrate 23 exposed, or a configuration in which a coating generated during molding is formed on the end of the mounting portion substrate 23. In this case, one end 21a, 41a of the first mounting portion 21 and the second mounting portion 41 becomes the end of the substrate mounting portion 22a with a recessed surface, and the first connecting end 63a and the second connecting end 63b of the connecting portion 61 are integrally molded with the end of the substrate mounting portion 22a, respectively.

[0047] Furthermore, although the above-described embodiment described a configuration in which the internal angle α of the first wiper portion 11 and the second wiper portion 12 is selected to be 90°, the present invention is not limited to this. For example, as shown in Figure 7B, the machine tool wiper 114 may have a configuration in which the internal angle α of the first wiper portion 11 and the second wiper portion 12 is selected to be obtuse, or as shown in Figure 7C, the machine tool wiper 115 may have a configuration in which the internal angle α of the first wiper portion 11 and the second wiper portion 12 is selected to be acute. In the configuration shown in Figure 7B in which the internal angle α of the first wiper portion 11 and the second wiper portion 12 is selected to be obtuse, depending on the angle α, there may be cases in which a part of the second long side frame portion 22e side of the first connecting end portion 63a is not located on the other end portion 21b side of the first mounting portion 21 than the extension line L2 extending from one side 25 of the second mounting portion 41, but such a configuration is also acceptable. If a portion of the first connecting end 63a is located on the other end 21b side of the first mounting portion 21, the same effects as described above can be achieved. The same applies to a portion of the second connecting end 63b on the second long side frame portion 22e side. In the configuration shown in 7B of Figure 7, a connecting recess is not provided, but the system is not limited to this, and a connecting recess of the shape shown in Figures 2B to 2D may be provided.

[0048] Furthermore, as shown in Figure 8, the short frame portion 22c may have holes 22ca and 22cb, and the elastic absorber 70 may have indentations 70a and 70b. Figure 8 is a front view of a machine tool wiper 117, which has two holes 22ca and 22cb in the short frame portion 22c and two indentations 70a and 70b in the elastic absorber 70, compared to the machine tool wiper 111 shown in Figure 6A. Other embodiments such as Figure 6B and Figure 7B may also have configurations with holes 22ca and 22cb and indentations 70a and 70b. The mounting base plate 23 can be stably fixed by the short frame portion 22c, and the flexibility of the short frame portion 22c can be increased by providing holes 22ca and 22cb in the short frame portion 22c. Furthermore, the presence of indentations 70a and 70b in the elastic absorber 70 makes it easier for the elastic absorber 70 to collapse when it comes into contact with the end of another machine tool wiper, thus facilitating bonding with other wipers. The number of holes and indentations is not limited; for example, there may be one of each, or there may be three or more. In addition, the short side frame portion 22c may be provided with indentations such as indentation 70a to create an uneven surface. Alternatively, the elastic absorber 70 may be configured to have one or more holes such as hole 22ca.

[0049] Furthermore, as shown in Figure 9, the machine tool wiper 90 may also have a reinforcing portion 81 made of canvas or the like provided on the back surface 32b of the extended portion 32 of the first lip portion 31. In this case, the second lip portion 51 is also provided with a reinforcing portion 81 on the back surface 32b of the extended portion 32, similar to the first lip portion 31. Even with such a machine tool wiper 90, the same effects as the embodiment described above can be achieved by providing the connecting portion 61 and the elastic absorber 70 described above.

[0050] (Second Embodiment) (1) Configuration of a wiper for machine tools Next, a machine tool wiper according to the second embodiment will be described. Figure 10 is a front view showing the front configuration of the machine tool wiper 13 according to the second embodiment. The machine tool wiper 10 according to the first embodiment described above has a configuration in which the first mounting portion 21 and the second mounting portion 41 are joined at a predetermined angle α by a connecting portion 61, and the other ends 21b, 41b of the first mounting portion 21 and the second mounting portion 41 are formed of elastic absorbers 70. In contrast, the machine tool wiper 13 according to the second embodiment does not have a connecting portion 61 and is a machine tool wiper 13 formed in a straight line, with one end 121a of the mounting portion 121 formed of elastic absorbers 70.

[0051] In this case, the machine tool wiper 13 comprises a mounting portion 121 and a lip portion 131 provided along one side 25 extending in the longitudinal direction of the mounting portion 121. The mounting portion 121 comprises a lip connecting portion 22 and a mounting portion substrate 23 laminated on a recessed substrate mounting portion 22a of the lip connecting portion 22. The mounting portion 121, consisting of the lip connecting portion 22 and the mounting portion substrate 23, has a plurality of through holes 24 extending through its thickness along its longitudinal direction. The lip portion 131 comprises a bent portion 27, an extended portion 32, and a lip tip portion 33, which are provided protruding from one side 25 of the first long side frame portion 122d, which is the thickened portion of the lip connecting portion 22. A groove 26 is provided near the inner corner boundary between the bent portion 27 and the extended portion 32. The lip tip portion 33 has a tip corner portion 33a and an opposing corner portion 33b. The above configuration is the same as that of the first wiper section 11 or the second wiper section 12 of the first embodiment.

[0052] The lip connecting section 22 comprises a substrate mounting section 22a, a first long-side frame section 122d, a second long-side frame section 22e, and an elastic absorber 70, and these substrate mounting section 22a, the first long-side frame section 122d, the second long-side frame section 22e, and the elastic absorber 70 are integrally molded. The first long-side frame section 122d, the second long-side frame section 22e, and the elastic absorber 70 are arranged in a U-shape so as to surround the outer circumference of three sides of the mounting section substrate 23. The longitudinal direction of the first long-side frame section 122d and the second long-side frame section 22e is aligned with the longitudinal direction of the mounting section 121. The longitudinal direction of the elastic absorber 70 is aligned in the width direction perpendicular to the longitudinal direction of the first long-side frame section 122d and the second long-side frame section 22e. The elastic absorber 70 is provided to elastically absorb any misalignment between the ends of the wipers of other machine tools when they are joined together. In the lip connecting section 22, the remaining end 121b that is not formed by the elastic absorber 70 has an exposed end of the mounting base plate 23.

[0053] Similar to the first embodiment described above, it is preferable that the depth dimension of the elastic absorber 70 in the longitudinal direction along one side 25 of the mounting portion 121 is 0.5 mm or more and 20 mm or less. If it is less than 0.5 mm, the depth dimension of the elastic absorber 70 is not large enough, and it may be difficult to elastically absorb the displacement between the elastic absorber 70 and the end of another machine tool wiper connected to it. If it exceeds 20 mm, the ends of the first wiper portion 11 and the second wiper portion 12 may be elastically deformed by external forces, so it is preferable that it be 20 mm or less.

[0054] With the above configuration, the machine tool wiper 13 comprises a mounting portion 121 and a lip portion 131 provided on one side 25 of the mounting portion 121 and in close contact with the sliding surface. One end 121a of the mounting portion 121 is formed of an elastic absorber that elastically absorbs displacement when the ends of other machine tool wipers are joined together. As a result, the machine tool wiper 13 can suppress the occurrence of gaps between itself and the ends of other machine tool wipers by the elastic absorber 70, so that it can scrape off foreign matter from the sliding surface even if the usage situation changes, such as when it becomes necessary to join it with the ends of other machine tool wipers.

[0055] (2) Variant In the machine tool wiper according to the second embodiment described above, the case in which only one end 121a of the mounting portion 121 is formed by the elastic absorber 70 was described. However, the present invention is not limited to this, and as shown in Figure 11, both one end 221a and the other end 221b of the mounting portion 221 may be formed by the elastic absorber 70. In this case, the lip connecting portion 22 comprises a substrate mounting portion 22a, a first long side frame portion 222d, a second long side frame portion 22e, and a pair of elastic absorbers 70, and these substrate mounting portion 22a, the first long side frame portion 222d, the second long side frame portion 22e, and the pair of elastic absorbers 70 are integrally molded.

[0056] The first long frame portion 222d, the second long frame portion 22e, and the pair of elastic absorbers 70 are arranged in a rectangular shape so as to surround the outer circumference of all four sides of the mounting base plate 23. The longitudinal direction of the first long frame portion 222d and the second long frame portion 22e is aligned with the longitudinal direction of the mounting portion 221. The longitudinal direction of the elastic absorbers 70 is aligned with the width direction perpendicular to the longitudinal direction of the first long frame portion 222d and the second long frame portion 22e. For the machine tool wiper 14, similar to the second embodiment described above, it is preferable that the depth dimension of the pair of elastic absorbers 70 is 0.5 [mm] or more and 20 [mm] or less.

[0057] Even with the above configuration, the machine tool wiper 13 can suppress the occurrence of gaps between itself and the ends of other machine tool wipers thanks to the elastic absorber 70, so that it can scrape off foreign matter from the sliding surface even if the usage situation changes, such as when it becomes necessary to connect it with the ends of other machine tool wipers.

[0058] In the second embodiment described above, an elastic absorber 70 was provided at one end and / or the other end of the mounting portion of a linear machine tool wiper, but the present invention is not limited to this. As an example of a machine tool wiper according to another embodiment, as shown in 6C of Figure 6, in a machine tool wiper 116 in which the first wiper portion 11 and the second wiper portion 12 are directly joined at a predetermined angle without interposing the connecting portion 61 of the first embodiment, the ends of the first mounting portion 321, which is provided integrally with the second mounting portion in the machine tool wiper 116, may each be formed by an elastic absorber 70. Also, in the machine tool wiper 13 shown in Figure 10 and the machine tool wiper 14 shown in Figure 11, the elastic absorber 70 may be configured to have holes 22ca, 22cb or indentations 70a, 70b, similar to the embodiments described above.

[0059] Furthermore, the first mounting portion 21, which is integrated with the second mounting portion, has a mounting portion base plate 123 that has a predetermined angle to match the shape of the lip connecting portion 322, which has a right angle, obtuse angle, or acute angle, provided on the lip connecting portion 322. Even with such a machine tool wiper, if the usage situation changes, such as when it becomes necessary to connect it to the end of another machine tool wiper, the elastic absorber 70 can suppress the occurrence of gaps between it and the end of other machine tool wipers, so that foreign matter on the sliding surface can be scraped off. [Explanation of symbols]

[0060] 10, 13, 14, 90, 111, 112, 113, 114, 115, 116 Wipers for machine tools 11. First wiper section 12. Second wiper section 21 First mounting section 25 per side 31 First lip section 41 Second mounting section 51 Second lip section 61,161 Connecting part 70 Elastic absorber 121 Mounting part 131 Lip section

Claims

1. A wiper for machine tools that scrapes off foreign matter adhering to a pair of adjacent sliding surfaces that constitute a corner section, A first wiper portion having a first mounting portion and a first lip portion provided on one side of the first mounting portion and in close contact with one of the sliding surfaces, A second wiper portion having a second mounting portion and a second lip portion provided on one side of the second mounting portion and in close contact with the other sliding surface, A connecting portion that joins one end of the first mounting portion and one end of the second mounting portion, and positions the first wiper portion and the second wiper portion at a predetermined angle, Equipped with, The aforementioned connecting portion is made of an elastic material, The first connecting end of the connecting portion, which is joined to one end of the first mounting portion, is located on the other end side of the first mounting portion, relative to the extension line extending from one side of the second mounting portion. The second connecting end of the connecting portion, which is joined to one end of the second mounting portion, is located on the other end side of the second mounting portion, relative to the extension line extending from one side of the first mounting portion. Wiper for machine tools.

2. The thickness of the connecting portion is less than or equal to the thickness of the first mounting portion and the second mounting portion. A wiper for a machine tool as described in claim 1.

3. The aforementioned connecting portion includes, The width dimension of the connecting portion in the width direction of the first mounting portion, perpendicular to one side of the first mounting portion, is formed to be larger than the width dimension of the first mounting portion in that width direction, and the width dimension of the connecting portion in the width direction of the second mounting portion, perpendicular to one side of the second mounting portion, is formed to be larger than the width dimension of the second mounting portion in that width direction. A wiper for a machine tool as described in claim 1.

4. The other end of the first mounting portion and / or the other end of the second mounting portion are formed by an elastic absorber that elastically absorbs displacement when the ends of other machine tool wipers are joined together. A wiper for a machine tool as described in claim 1.

5. The depth dimension of the elastic absorber in the longitudinal direction along one side of the first mounting portion and / or second mounting portion on which the elastic absorber is provided is 0.5 mm or more and 20 mm or less. A wiper for a machine tool according to claim 4.

6. In a front view, the connecting portion has a connecting recess between the first connecting end and the second connecting end, with the corner recessed toward the center point of the connecting portion. The first connecting end and the second connecting end are connected by the connecting recess and are adjacent to each other at a predetermined angle with the connecting recess in between. A wiper for a machine tool as described in claim 1.

7. A wiper for machine tools that scrapes off foreign matter adhering to the sliding surface, It comprises a mounting portion and a lip portion provided on one side of the mounting portion and in close contact with the sliding surface, One end and / or the other end of the mounting portion are formed by an elastic absorber that elastically absorbs displacement when the ends of other machine tool wipers are joined together. Wiper for machine tools.

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