Length measuring device

Abstract

To provide a length measuring device capable of greatly changing a height of a length measuring position.SOLUTION: A length measuring device includes: a base table 2 having a slide rail; and a slide part having a length measuring instrument which is slidably installed on the slide rail. The base table 2 includes: a base part 15; a table 10 on which the slide rail is installed; and a table height adjustment column member 20 for supporting and connecting the table 10 to the base part 15 in a height-adjustable manner. The table height adjustment column member 20 includes: a lower column 26 fixed to the base part 15 side; an upper column 21 configured to be vertically slidable with respect to the lower column 26 and fixed to the table 10 side; and a column support connecting member 30 having a load pin 31 which is horizontally installed selectively at any of a plurality of height positions on one of the columns 21 and 26, and a recessed groove 22 which is installed in the other of the columns 21 and 26 and into which the load pin 31 enters during connection.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a length measuring device that measures the length of a workpiece machined by a machining device. [Background technology]

[0002] Conventionally, processing devices that perform various processes on a workpiece, such as cutting, drilling, and drawing, have been widely known. In such processing devices, in order to perform processing on the workpiece at an accurate cutting position, drilling position, drawing position, or other processing position, it is necessary to accurately measure the length from a desired location on the workpiece to the processing position.

[0003] In response to this, length measuring devices have been provided that measure the length of a workpiece machined by a processing device, and known length measuring devices include those disclosed in the following Patent Documents 1 to 3. Patent Documents 1 to 3 disclose a configuration in which a contact portion that contacts the end face of the workpiece is provided on a sliding body having a measuring device that is slidably installed on a slide rail, and the length of the workpiece is measured from the measurement value of the measuring device when this contact portion is in contact with the end face of the workpiece.

[0004] Furthermore, Patent Document 4 discloses a freestanding length measuring device that is not directly fixed to a processing device but is installed next to the processing device and can measure the length of a workpiece. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-002706 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-152400 [Patent Document 3] Japanese Patent Application Laid-Open No. 2016-155176 [Patent Document 4] Japanese Patent Application Publication No. 2018-66672 Summary of the Invention [Problem to be solved by the invention]

[0006] Here, since the height of the processing position may differ depending on the processing device, it is desirable that the height of the measurement position by the length measuring device be variable according to the height of the processing position. However, in the freestanding length measuring device disclosed in Patent Document 4, although the height can be finely adjusted by screwing in the legs, the height of the length measuring position cannot be changed greatly.

[0007] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a length measuring device that can greatly change the height of the length measuring position. [Means for solving the problem]

[0008] In order to solve the above problems, a length measuring device according to the present invention is used in combination with a workpiece processing device to measure the length of a workpiece processed by the workpiece processing device, and comprises: a base table having a slide rail that is installed beside the workpiece processing device when measuring the length; a slide section that is installed slidably on the slide rail, the slide section having a length measuring instrument that measures the distance that the slide section moves along the slide rail, and an arm section that comes into contact with the workpiece when measuring the length; and the base table comprises a base section, a table on which the slide rail is installed, and a table height adjustment column member that supports and connects the table to the base section so that the height of the table can be adjusted. The table height adjustment column member comprises a lower column fixed to the base portion side, an upper column configured to be slidable in a vertical direction relative to the lower column and fixed to the table side, and a column support connecting member for supporting and connecting the upper column with the lower column, the column support connecting member having a load pin selectively installed horizontally at any of a plurality of height positions on one of the lower column or the upper column, and a recessed groove installed on the other of the lower column or the upper column into which the load pin enters when connected, wherein the upper column and the lower column are cylindrical, the load pin is stretched between opposing side surfaces of the lower column or the upper column, and the recessed groove faces the lower end of the upper column and opens downward. Two sides or the upper end of the lower pillar, which opens upward and faces the U-shaped groove formed in the Two sides It is characterized by a U-shaped groove formed in each of the [Effects of the Invention]

[0009] According to the length measuring device of the present invention, the table height adjustment column member allows the table to be stably and securely connected to the base portion in a height-adjustable manner, and the height of the length measuring position can be changed greatly. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a length measuring device according to an embodiment of the present invention. [Figure 2]FIG. 2 is a perspective view of a base table according to the embodiment of the present invention. [Figure 3] FIG. 3 is an exploded perspective view of the base stand according to the embodiment of the present invention. [Figure 4] FIG. 4 is a perspective view of a base table according to the embodiment of the present invention. [Figure 5] FIG. 5 is a perspective view showing a state in which the length measuring device according to the embodiment of the present invention is used. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a length measuring device 1 according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a freestanding length measuring device 1 is described, which is installed freestanding beside a cutting device 9 and measures the length of a workpiece to be cut to a predetermined length by the cutting device 9, and which has an adjustable height for the measurement position.

[0012] The length measuring device 1 comprises a base table 2 that is installed on the installation floor surface, and a slide section 5 that is installed so as to be able to slide freely on the base table 2. The base table 2 comprises a table 10, a base section 15, a table height adjustment column member 20, and a slide rail 40. In this embodiment, the steel plates that make up the table 10, base section 15, table height adjustment column member 20, etc. that make up the base table 2 are made thicker and heavier, making it difficult for the freestanding length measuring device 1 to move relative to the installation floor surface.

[0013] The table 10 is a platform on which the workpiece is placed during cutting, and is equipped with a workpiece setting rail 11 that allows the workpiece to be slidably set in the length measurement direction, and a hanging bracket 14 for suspending the base table 2 with a crane or the like. The hanging bracket 14 is detachably fastened to the top surface of the table 10 with screws.

[0014] The base part 15, which is placed on the floor surface, is a rectangular plate with height fine-adjustment legs 16 placed at the four corners, and is placed on the installation floor surface via the height fine-adjustment legs 16. The height fine-adjustment legs 16 are so-called adjuster bolts (level adjusters), and are connected and fixed to the underside of the base part 15.

[0015] The height fine-adjustment leg 16 includes a bolt 17 with a sphere formed at its lower end and a pad 18 with a sphere receiving portion for receiving the sphere inside. The bolt 17 is a long male screw that is screwed vertically into a female screw formed in the base portion 15 to connect the bolt 17 to the female screw.

[0016] When the bolt 17 rotates around the vertical axis, the bolt 17 and the base part 15 move relatively in the vertical direction by screw feed, so that by adjusting the height fine adjustment legs 16 installed at the four corners, the height and inclination of the base part 15 from the floor can be finely adjusted.

[0017] Pad 18 is made of resin (for example, glass fiber reinforced nylon resin) and has a generally circular disk shape, with a sphere receiving portion protruding upward in its center, and a rubber (for example, nitrile rubber) sheet (not shown) attached to its underside, which is the installation surface. Because rubber has a large static friction coefficient, if the installation surface of height fine-adjustment leg 16 is made of rubber, base stand 2 will not move easily relative to the floor surface.

[0018] The table height adjustment pillar member 20 is a pillar-shaped member that connects the table 10 to the base portion 15 so that the height can be adjusted in four stages, and includes an upper pillar 21, a lower pillar 26, a pillar support connecting member 30, and a pillar fixing member 35. In Figures 1, 3, and 5, the table height adjustment pillar member 20 is connected at the lowest height of the four stages, and in Figure 4, the table height adjustment pillar member 20 is connected at the highest height of the four stages.

[0019] The upper column 21 and the lower column 26 are rectangular tubular, with a U-shaped horizontal cross section and one side open, and are erected vertically. The lower column 26 is slightly larger than the upper column 21, and with the lower part of the upper column 21 housed inside the lower column 26, the two are configured to be relatively slidable in the vertical direction.

[0020] The height of the table height adjustment column member 20 changes as the upper column 21 and the lower column 26 slide vertically. Two table height adjustment column members 20 are installed, one on each side. The two installed upper column 21 and lower column 26 have openings on the inner side faces facing each other.

[0021] The upper end of the upper column 21 is welded to the underside of the table 10 while standing upright, and is provided with U-shaped grooves 22, which are recessed grooves that open downward and are formed at the lower ends of two opposing side surfaces, and column fixing holes 23 formed at the same opposing positions on the two opposing side surfaces. The U-shaped grooves 22 are also components of the column support connecting member 30, and the column fixing holes 23 are also components of the column fixing member 35.

[0022] The lower end of the lower column 26 is welded to the upper surface of the base 15 while standing upright, and is provided with multi-stage column fixing holes 28 formed at the same opposing positions on two opposing side surfaces, a load pin 31, and multi-stage pin holes 33 also formed at the same opposing positions on two opposing side surfaces. The load pin 31 and multi-stage pin holes 33 are also components of the column support connecting member 30, and the multi-stage column fixing holes 28 are also components of the column fixing member 35.

[0023] The column support connecting member 30 is a member for supporting and connecting the upper column 21 at a predetermined height using the lower column 26, and is equipped with a U-shaped groove 22 installed on the upper column 21, and a load pin 31 and a multi-stage pin hole 33 installed on the lower column 26.

[0024] The multi-step pin holes 33 are formed in a vertical row at a predetermined interval on each of two opposing side surfaces of the lower column 26. The load pin 31 is installed at a predetermined height by passing it horizontally through two opposing multi-step pin holes 33 located at the same height. In other words, the installation position of the load pin 31 on the lower column 26 can be adjusted to four heights.

[0025] To prevent the load pin 31 from coming out after being installed in the multi-stage pin hole 33, the load pin 31 is provided with a large diameter head 31a larger than the multi-stage pin hole 33, a tip prevention hole 31b, and a split pin 32 which is a pin for preventing coming out.

[0026] With the load pin 31 passing from its tip through the two opposing multi-stage pin holes 33, a split pin 32 can be inserted into the anti-dropout hole 31b at the tip of the pin, thereby firmly fixing the load pin 31 in the multi-stage pin hole 33 at a predetermined height. When the load pin 31 is installed in the lower column 26, the load pin 31 is suspended horizontally between the two opposing side surfaces of the lower column 26, i.e., inside the lower column 26.

[0027] After the load pins 31 are installed, the table 10 and upper columns 21 are hung from above using the hanging hardware 14, and when the two upper columns 21 are lowered in a state where they are positioned directly above the two lower columns 26 (see Figure 4(A)), the upper columns 21 will enter the inside of the lower columns 26.

[0028] As the table 10 and upper column 21 are further lowered, the load pin 31 located directly below the U-shaped groove 22 at the lower end of the upper column 21 enters the U-shaped groove 22, and when the load pin 31 contacts the inner part (upper end) of the U-shaped groove 22, the descent of the upper column 21 stops (see Figure 4(B)). As a result, the load of the table 10 and upper column 21 is supported by the load pin 31, and the upper column 21 and lower column 26 are supported and connected together.

[0029] In this way, the load of the table 10 and upper column 21, which are heavy objects, is applied to the two load pins 31, and when the length measuring device 1 is in use, the load of the slide rail 40, slide section 5, workpiece, etc. is also applied to the two load pins 31, so the load pins 31 have a certain thickness so that they can withstand these loads.

[0030] The column fixing member 35 is a member for firmly fixing the upper column 21 and the lower column 26, which are supported and connected by the column support connecting member 30, so that they do not move relative to each other, and is equipped with a column fixing hole 23 installed in the upper column 21, a multi-stage column fixing hole 28 installed in the lower column 26, and four fixing screw members 36.

[0031] In the upper column 21, only one column fixing hole 23 is provided beside the U-shaped groove 22, and a female screw is formed in the hole. In the lower column 26, the multi-stage column fixing holes 28 are provided beside the multi-stage pin holes 33, and are arranged in a row in the vertical direction parallel to the multi-stage pin holes 33, and four multi-stage column fixing holes 28 are formed at the same height as the multi-stage pin holes 33.

[0032] In this embodiment, the column support connecting member 30 allows the upper column 21 to be adjusted to four different heights relative to the lower column 26, but no matter what height the upper column 21 is positioned at, one of the four multi-stage column fixing holes 28 is located at the position opposite the column fixing hole 23. In this support and connection state, the fixing screw member 36 can be passed through the opposing multi-stage column fixing holes 28 and column fixing holes 23 and screwed into place.

[0033] In this way, by fastening with the fixing screw member 36, the upper column 21 and the lower column 26, which are supported and connected by the column support connecting member 30, are firmly fixed so that they do not move relative to each other. This reliably prevents a situation in which the upper column 21 moves upward relative to the lower column 26 and the load pin 31 comes out of the U-shaped gutter 22, for example, in the event of vertical shaking due to an earthquake or the like.

[0034] Here, the load of the table 10 and the like is received by the load pin 31, and the fixing screw member 36 simply serves to fasten the upper column 21 and the lower column 26 so that they do not move relative to each other. Therefore, a relatively small screw can be used as the fixing screw member 36. The fixing screw member 36 is equipped with an anti-loosening washer (not shown), so it will not easily loosen after being screwed in.

[0035] The slide rail 40 is fixedly installed on the upper surface of the table 10 so as to extend in the longitudinal direction. A pair of slide grooves 41 extending in the sliding direction are formed on both side surfaces of the slide rail 40 in the sliding direction. A slide stopper 42 is installed at the end of the slide rail 40 in the sliding direction to prevent the slide portion 5 from coming off the end of the slide rail 40.

[0036] The slide unit 5 includes a slide body 50, an arm unit 60, and a digital length measuring device 80. The slide body 50 has a clamp 55 and a linear guide (not shown), and is slidable relative to the slide rail 40 and is installed so as to be fixable at a predetermined slide position.

[0037] The arm section 60 includes an arm support shaft 61 fixed to the slide body 50, a spring 63, and a workpiece contact arm 65. When measuring the length of the workpiece, the tip of the workpiece contact arm 65 comes into contact with the cutting device 9 and the workpiece.

[0038] The workpiece contact arm 65 is supported by an arm support shaft 61 extending in the sliding direction so that it can slide a small distance in the sliding direction. A spring 63 is installed coaxially with the arm support shaft 61, and urges the workpiece contact arm 65 toward its tip end by its elastic force.

[0039] The digital length measuring device 80 is equipped with a distance measuring unit (not shown) that measures the sliding distance of the sliding body 50 relative to the slide rail 40, and is equipped with a display unit 82 that displays the measurement value measured by this distance measuring unit. The worker can reset the sliding distance to 0 by operating the digital length measuring device 80.

[0040] The length measuring device 1 is used to measure the distance from one end of the workpiece to a specified part of the workpiece to be measured, and the distance measuring unit is configured to output the distance from the origin, which is the point where the slide distance is reset, as the measurement value.

[0041] The distance measuring section of the digital length measuring device 80 measures in the direction away from the processing position, which is the origin (approximately to the right in Figure 1), as the positive direction, and displays the distance from the origin to the location where the sliding section 5 is currently located, rather than the total sliding distance of the sliding section 5 from the origin.

[0042] The configuration of the length measuring device 1 has been described above, and next, a procedure will be described for cutting the workpiece to a predetermined length by the cutting device 9 while measuring the length of the workpiece by the length measuring device 1. Fig. 5 is a perspective view showing the use state of the length measuring device according to this embodiment.

[0043] In this embodiment, the length measuring device 1 is used in combination with the cutting device 9, and when measuring the length, the length measuring device 1 is installed next to the cutting device 9. By performing the cutting work while using the length measuring device 1, the cutting device 9 can accurately cut the workpiece to the desired length at the desired cutting position (processing position).

[0044] Specifically, before placing the workpiece, slide the slide portion 5 to position the tip of the workpiece contact arm 65 that contacts the workpiece at the cutting position, which is the processing position (the position where it contacts the side of the cutting blade 91 of the cutting device 9), and then reset the measurement value of the digital length measuring device 80 to 0.

[0045] Next, the slide unit 5 is slid a desired distance away from the cutting position so that the workpiece can be cut out to a predetermined length. At this time, when the slide unit 5 is slid, the distance moved from the reset position (cutting position) is displayed on the display unit 82 of the digital length measuring device 80.

[0046] Then, the slide unit 5 is fixed at a position where the display value on the display unit 82 is the desired length. This makes the distance from the cutting position to the tip of the work abutting arm 65 the desired length, so that when the work is placed on the work setting rail 11 so that one end of the work abutting arm 65 is in contact with the tip of the work abutting arm 65 and the cutting operation is performed, the work can be cut to the desired length.

[0047] The length measuring device 1 according to this embodiment has been described in detail above, but according to the length measuring device 1, there is no need to fix it to a processing device such as the cutting device 9, and it can be installed freestanding on the floor near the processing device. If it is a freestanding length measuring device 1 that does not need to be fixed to the processing device, it is not limited by the shape of the processing device and can be used in combination with processing devices from various manufacturers that are already installed in factories, as an add-on.

[0048] In addition, in this embodiment, the height of the table 10 on which the slide unit 5 is installed can be set to a desired height by the table height adjustment column member 20. That is, length measurement can be performed at a desired height in accordance with the height of a processing device such as the cutting device 9. Furthermore, according to this embodiment, the height fine adjustment legs 16 can also be used to finely adjust the height and angle of the table 10.

[0049] In addition, in this embodiment, the table height adjustment column member 20 is equipped with a column support connecting member 30 that is mainly for receiving the load, and a column fixing member 35 that is mainly for fixing so that it does not move relative to the other member, and since the load receiving function and the fixing function are performed by separate members, the table 10 can be stably and securely connected to the base portion 15 in a height-adjustable manner.

[0050] Furthermore, in this embodiment, the column support connecting member 30 for receiving the load is composed of a load pin 31 and a U-shaped groove 22, so when supporting and connecting the upper column 21 to the lower column 26, it is sufficient to hang the table 10 and the upper column 21 with a crane or the like and lower them so that the load pin 31 enters the U-shaped groove 22. This makes it possible to easily perform the connecting work without having to perform difficult tasks such as accurately aligning holes.

[0051] Furthermore, in this embodiment, when the upper column 21 and the lower column 26 are supported and connected by the column support connecting member 30, the positions of the two fixing holes 23, 28 of the column fixing member 35 are configured to be exactly opposite each other, so that the fixing work after the support and connection work can be easily performed without the need for work such as alignment.

[0052] Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the present invention. For example, the shape and size of each member constituting the length measuring device according to the present embodiment can be changed as appropriate.

[0053] In the above embodiment, two column support connecting members are provided to support and connect the table to the base portion in a height-adjustable manner, but one, or three or more may be provided. In the above embodiment, a cutting device is used as an example of a processing device, but the length measuring device according to this embodiment can be used in combination with various other processing devices, such as a drilling device that drills holes in predetermined locations on a workpiece, or a line drawing device that draws lines in predetermined locations on a workpiece.

[0054] In addition, in the above embodiment, the load pin and the multi-stage pin hole for supporting the load pin horizontally are installed on the lower column, and the U-shaped groove into which the load pin fits is installed on the upper column, but it is also possible to install the load pin and the multi-stage pin hole on the upper column and the U-shaped groove on the lower column.

[0055] However, in order to make the pillar structure simple and stable, it is desirable to install a load pin inside a larger pillar and insert a smaller pillar with a U-shaped groove inside this pillar.

[0056] Furthermore, in the above embodiment, with regard to the column fixing member, the multi-stage column fixing hole is installed on the lower column and the column fixing hole is installed on the upper column, but they may be installed upside down, and the positions where the column fixing hole and multi-stage column fixing hole are formed are not limited to be next to the multi-stage pin hole, and they can be installed in any appropriate location. [Explanation of symbols]

[0057] 1. Length measuring device 2 base stand 10 tables 11 Workpiece installation rail 14 Hanging hardware 15 Base 16 Height adjustment legs 17 volts 18 pads 20 Table height adjustment column member 21 Upper pillar 22 U-shaped groove 22a Deep part of groove 23 Pillar fixing hole 26 Lower pillar 28 Multi-stage pillar fixing hole 31 Load pin 33 Multi-stage pin hole 30 Column support connecting member 31 Load pin 31a large diameter head 31b Tip prevention hole 32 Broken pin 33 Multi-stage pin hole 35 Pillar fixing member 36 Fixing screw member 40 Slide rail 41 Slide groove 42 Slide stopper 5 Slide section 50 Slide body 55 Clamp 60 Arm section 61 Arm support shaft 63 Spring 65 Work contact arm 80 Digital length measuring instrument 82 Display section 9 Cutting device 91 Cutting blade

Claims

1. A length measuring device used in combination with a workpiece processing device to measure the length of a workpiece processed by the workpiece processing device, a base table having a slide rail, which is installed beside the workpiece processing device during length measurement; a slide unit slidably installed on the slide rail, the slide unit having a length measuring device for measuring the distance that the slide unit moves along the slide rail, and an arm unit that comes into contact with the workpiece during length measurement; the base table includes a base portion, a table on which the slide rail is installed, and a table height adjustment column member that supports and connects the table to the base portion so that the height of the table can be adjusted; The table height adjustment column member is a lower pillar fixed to the base portion side; an upper column configured to be slidable in a vertical direction relative to the lower column and fixed to the table; a column support connecting member for supporting and connecting the upper column by the lower column, the column support connecting member having a load pin selectively installed horizontally at any of a plurality of height positions on one of the lower column or the upper column, and a recessed groove installed on the other of the lower column or the upper column into which the load pin enters when connecting; A length measuring device characterized in that the upper column and the lower column are cylindrical, the load pin is stretched between opposing side surfaces of the lower column or the upper column, and the grooves are U-shaped grooves that open downward at the lower end of the upper column and are formed on each of the two opposing side surfaces, or U-shaped grooves that open upward at the upper end of the lower column and are formed on each of the two opposing side surfaces.

2. The upper pillar is slightly smaller than the lower pillar, and its lower part is inserted into the lower pillar, the load pin is stretched between opposing sides of the lower column; 2. The length measuring device according to claim 1, wherein the recessed groove is a U-shaped groove formed at the lower end of the upper column and opening downward.

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