JPH04133337U - Mounting structure of non-contact detector - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a mounting structure for a non-contact detector that can be easily attached/detached and positioned, and can be securely fixed in that position. [Structure] The non-contact detector 30 is inserted into the holder 70 fixed to the mounting member, and the locking parts 34, 34a are connected to the holder 70.
0, and the sliding tube 45 is slid and locked.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention enables detection of the presence or absence of an object to be detected without contacting the object, such as a proximity switch, for example. , related to non-contact detectors that detect quantities, etc., and more specifically, the function of fixing them to holders. The present invention relates to a mounting structure for a non-contact detector.

0002

[Conventional technology]

For example, a proximity switch usually includes a detection coil, an oscillation circuit, a detection circuit, and a switch. The detection circuit section consists of a When an object to be detected approaches the detection surface of the detection coil, the oscillation circuit is activated. Since the oscillation state changes, this change can be detected by a detection circuit to create a switching circuit. This is then amplified by an amplifier circuit and output from the cable as a detection signal. It is composed of

0003 FIG. 8 is a longitudinal sectional view showing an example of a conventional cylindrical proximity switch. In the figure, 1 is a bottomed cylinder made of molded synthetic resin and has an opening at the rear to form an opening 2. The case has a male thread 3 for mounting on the outer periphery, and a female thread on the rear inner periphery. 4 are provided. 5 is a detection coil, which is connected to the core 6 which has a through hole 7 in the center. It is wrapped with Ile 8. 9 is inserted into the through hole 7 of the core 6 and is integrated with the core 6. A printed circuit board with an oscillation circuit section (not shown), etc. A plate 10 is attached. 11 is an LED attached to the printed circuit board 10. Ru.

0004 12 is a nearly hollow cylindrical plug, and the front part has a socket that screws into the female thread 4 of case 1. A screw 13 is provided, and a fitting groove 14 for an O-ring 15 is formed at the rear of the male screw 13. A large diameter part 16 having the same external shape as the lower part of the case 1 is formed at the rear of the fitting groove 15. has been done. 17 is a cable.

[0005] To assemble the above-mentioned proximity switch, for example, attach the printed circuit board 10. The supporting member 9 is fitted into the through hole 7 and integrally connected, and then attached to the printed circuit board 10. The detection coil 5 to which the cable 17 is connected is housed in the case 1 through the opening 2. . Next, the synthetic resin 19 in a molten state is inserted into the male thread 3 through the opening 2 of the case 1. Inject and fill to the position.

[0006] Next, insert the male thread 13 of the plug 12 with the O-ring 15 fitted into the fitting groove 14 into the case. 1, and inject molten synthetic resin 19 from the opening of plug 1. Fill and solidify. As a result, the case 1 and the plug 12 are integrally connected, and the Output coil 5, printed circuit board 10, cable 17, etc. are placed inside case 1 and plug 12. positioned and sealed watertight.

[0007] In addition, in order to install such a proximity switch on a production line, etc., it is necessary to install it as shown in Figure 9. Insert the case 1 into the through hole 22 provided in the mounting plate 21, and then insert the nuts 20 and 20 from both sides. 20a and fix it. At this time, the end face (detection face) 18 of the proximity switch is covered. The position with the highest detection efficiency for the detection object 23, that is, the distance between the two is Lm. Fix it so that

[0008]

[Problem that the idea aims to solve]

In the conventional non-contact detector as described above, the case 1 is directly fixed to the mounting plate 21. Because of this, it is troublesome to install or repair or replace due to malfunction. Especially when repairing or replacing, remove the nut 20 and attach the non-contact detector to the mounting plate 21. The repaired or new non-contact detector must be removed from the mounting plate 2. 1, the detection surface 18 of the non-contact detector is separated by Lm from the detected part 23. This makes the work extremely difficult as you have to adjust the position each time so that it is in the correct position. It was extremely troublesome and required a lot of man-hours.

[0009] This invention was made to solve the above problem, and it is difficult to attach, remove, repair, or replace. The purpose of this invention is to provide a non-contact detector mounting structure that is extremely easy to install.

0010

[Means to solve the problem]

The mounting structure of the non-contact detector according to the present invention is that the rear opening is provided with an L from the detection surface on the outer surface. A cylindrical case having a locking portion protruding at a position and a pair of locking pieces extending oppositely. and a screw is provided at the rear, and is housed in the case and has a space between the case and the case. an inner cylinder forming a gap g; a small diameter portion slidably inserted into the gap g; a large diameter part, at least an internal thread is provided on the inner wall of the small diameter part, and a female thread is provided on the inner wall of the small diameter part; an elongated hole into which the locking piece of the case is inserted from the part to the large diameter part, and the elongated hole a sliding tube with a thin wall between the rear end and the large diameter portion; It has a detection part and a detection circuit part housed therein, and the opening of the inner cylinder is a connector receiver. a non-contact detector in which the case and inner cylinder are closed and filled with synthetic resin; Both ends are open, a thread is provided on the outer periphery, and it is fixed to the mounting member with a nut. It has a cylindrical body, and an engagement groove is provided on the inner wall at a position L from one end of the body. Consists of a holder, Insert the non-contact detector through the opening of the holder and insert the locking part protruding from the locking piece. The holder is engaged with the locking groove, and the sliding tube is slid so that the thin part thereof is connected to the locking piece. It is designed to be inserted between the inner cylinder and the inner cylinder.

[0011]

[Effect]

Insert the holder into the through hole provided on the mounting plate, adjust the distance to the detected part, and then Fix it in position with a nut. Next, insert the non-contact detector through the rear opening of the holder. When the locking part comes into contact with the rear end of the holder, push down both locking pieces and open the elongated hole of the sliding tube. Insert it inside. If you push it further in this state, the locking part will stop engaging with the locking groove of the holder. do. At this time, the detection surface of the non-contact detector is on the same plane as the front end of the holder. Then, when the sliding cylinder is pushed in, its thin wall part will be inserted into a wedge shape between the inner cylinder and the locking piece of the case. and lock. This ensures that the non-contact detector is accurately positioned within the holder. Fixed.

0012 To remove the non-contact detector, move the sliding tube back and press down on the locking piece. will escape from the engagement groove of the holder, so you can just pull it out as it is. Unconnected again To install the touch detector, attach it to the remaining holder as described above, and it is especially easy to install. It is reliably positioned and fixed in that position without the need for adjustment.

[0013]

【Example】

Figure 1 is an exploded perspective view of an embodiment of the present invention implemented in an oscillation type proximity switch, and Figure 2 is an exploded perspective view of an oscillation type proximity switch. FIG. 3 is a longitudinal sectional view of the holder. Furthermore, as explained in Figure 8, The same parts as in the conventional example are given the same reference numerals, and their explanation will be omitted.

[0014] In the figure, 31 is a cylindrical case made of synthetic resin with one end open. At positions facing the opening, there are sloped surfaces 33, 33a on the inner surface of the rear end that widen toward the end. The locking pieces 32, 32a are extended. Note that this case 31 has both ends open. However, the front opening may be closed with a front lid and fixed with adhesive. 34, 34a are locked The locking portions 35, 35a are the locking portions 35, 35a protruding from the outer surfaces of the pieces 32, 32a. This is a flange provided on the outer surface of the rear end. 36 is a large outer diameter that matches the inner diameter of the case 31. A diameter portion 37, a small diameter portion 38 having a smaller diameter than the inner diameter of the case 31, and an opening provided at the rear end. It is a metal inner cylinder with screws 39 open at both ends, and the male screw 39 is external. It is inserted into the case 31 so that the has been completed. Note that this inner cylinder 36 has a cylindrical tip end portion instead of the large diameter portion 37. Provide a protrusion or flange to form a gap g, or provide a space between the case 31 and the case 31. You may also insert a

[0015] 40 is fitted into the inner cylinder 36 from the rear opening of the cylinder 36, and is coated with adhesive if necessary. It is a cylindrical connector receiver with a bottom that is glued with It is planted. 42 is a resin injection hole provided at the bottom. In addition, 43 is case 3 This is a shielding ring attached to the outer periphery of the tip of 1.

[0016] 45 is a sliding tube consisting of a small diameter part 46, a large diameter part 47 and a flange part 48; The inner wall of the portion excluding the vicinity of the side or the inner wall of the small diameter portion 46 is threaded into the male thread 39 of the inner cylinder 36. A matching female thread 49 is provided. In addition, from the small diameter portion 46 to the opposing position of the peripheral wall, Elongated holes 50 and 50a are formed across the large diameter portion 47, and the elongated hole 5 is formed in the large diameter portion 47. Guide walls 51 and 51a are provided along the ridges 0 and 50a to reach the collar portion 48. 5 2 and 52a are thin parts formed between the ends of the elongated holes 50 and 50a and the collar part 48. Ru. The small diameter portion 46 of this sliding tube 45 slides into the gap g formed between the case 31 and the inner tube 36. The large diameter portion 47 is formed in a size that allows it to fit freely in the case 31. The outer diameter is approximately equal to the outer diameter. In addition, the elongated holes 50, 50a and the guide groove 5 The width of the locking pieces 32, 32a of the case 31 is approximately equal to the width of the locking pieces 32, 32a of the case 31. There is.

[0017] To assemble the proximity switch 30 as described above, remove the prism from the opening of the case 31. The detection coil 5 to which the component board 10 is connected is inserted and brought into contact with the bottom. Next Insert the inner cylinder 36 into the base 31 and connect the connector pin 41 to the printed circuit board 10. Insert the connector receiver 40 into the small diameter opening of the inner cylinder 36, and adjust the position of the inner cylinder 36. After adjusting the resin, inject resin from the resin injection port 42, and then The base plate 10, the inner cylinder 36, and the connector receiver 41 are joined together. Next, the inner cylinder 36 Screw the sliding tube 45 into the male thread 39 from the small diameter portion 46 side and allow the male thread 39 to pass through. . At this time, the locking pieces 32 and 32a of the case 31 are provided on the large diameter portion 47 of the sliding tube 45. The small diameter portion 46 is formed by the case 31 and the inner cylinder 36. It is located within the gap g.

[0018] A connector 60 is attached to the holder 61 and is a connector receiver provided in the inner cylinder 36. Plug 62 connected to 41, and a plug that rotates around the outer circumference of plug 62 but moves back and forth. A nut 63 that is attached to the male thread 39 of the inner cylinder 36 and a case It consists of Bull 17.

Reference numeral 70 denotes a holder, which is formed into a cylindrical shape from metal, synthetic resin, etc., and has a male thread 71 on its outer periphery, and an engagement groove 72 adjacent to one opening on the inner wall. . Nuts 20 and 20a are screwed onto the holder 70. The inner diameter d ₂ of the holder 70 is approximately equal to the outer diameter d ₁ of the case 31 of the proximity switch, and the length L ₂ is measured from the tip of the case 31 to the flanges 35, 35a of the locking pieces 32, 32a. _{The length L 4 from} the tip to the engagement groove 72 is equal to the length L ₃ from the tip of the case 31 to the locking parts 34, 34a of the locking pieces 32, 32a. It is formed.

[0020] Next, we will explain how to install the proximity switch 30 using the holder 70 as described above. Ru. First, as shown in FIG. 4, insert the holder 70 into the through hole 22 provided in the mounting plate 21. After adjusting the distance Lm between the tip and the detected object 23, remove the nut 2 from both sides. 2 and 22a to fix it in that position. Next, the front end of the proximity switch 30 (detection (extruded surface) from the rear opening of the holder 70 and push it in. The state at this time is shown in Figure 4. Shown in Figure 5. In this state, the locking portions 32 provided on the locking pieces 32, 32a of the case 31 , 34a come into contact with the rear end of the holder 70 and are prevented from moving forward, and the sliding cylinder 45 is moved against the inner cylinder 3. The female thread 49 at the rear end of the inner cylinder 36 contacts the male thread 39 of the inner cylinder 36 and can be moved back. Moreover, since the locking pieces 32, 32a of the case 31 are inside the guide walls 51, 51a, rotation is not possible. Rolling is prevented.

[0021] Next, hold the locking pieces 32, 32a of the case 31 with your fingers, and When the case 31 is pushed forward into the holder 50a, the locking portions 34, 34a engage with the holder 7. It fits into the engagement groove 72 of 0 and stops, and the flanges 35, 35a abut against the end of the holder 70. do. At this time, the detection surface of the case 31 is in front of the holder 70 as shown in FIGS. 6 and 7. flush with the end. Next, when the sliding tube 45 is advanced, the thin wall portion 52 , 52a are formed at the inner cylinder 36 and the tip of the locking pieces 32, 32a of the case 31. It enters between the inclined surfaces 33 and 33a, forms a wedge, and pushes up the locking pieces 32 and 32a. and lock it.

[0022] In this way, the case 31 connects the locking portions 34, 34a and the engagement groove 72 of the holder 70. and locked by the sliding tube 45 to ensure accurate positioning within the holder 70. will be reliably maintained. Then, if the connector 60 is connected to the connector receiver 40, The detection signal can be transmitted to the outside via cable 17.

[0023] When removing the proximity switch 30 from the holder 70 for maintenance inspection, replacement, etc. , first move the sliding tube 45 backward to release the lock, and then use your fingertips etc. to engage the case 31. Push down the stop pieces 32, 32a and fit them into the elongated holes 50, 50a of the sliding tube 45 to lock the locking parts. 34, 34a from the engagement groove 72 and pull it toward you, the proximity switch 30 can be moved to the home position. It can be taken out from the folder 70. At this time, the connector 55 may remain connected. , may be removed.

[0024] In addition, the proximity switch 30 that has undergone maintenance inspection and the new proximity switch 30 that has been replaced When installing the holder 70 remaining on the mounting plate 21, attach the proximity screw as described above. When the switch 30 is installed, the detection surface of the proximity switch 30 is Lm from the detected object 23. It is located on the same plane as the tip of the holder 70 located at a distance, and can be moved automatically without any special adjustment. Dynamically positioned.

[0025] In the above explanation, the present invention was applied to an oscillation type proximity switch. The book can be applied similarly to other non-contact detectors such as capacitive proximity switches and photoelectric switches. Able to implement ideas.

[0026]

[Effect of the idea]

As is clear from the above explanation, the present invention does not connect to the holder fixed to the mounting member. Insert the touch detector, engage its locking part with the engagement groove of the holder, and lock it with the sliding tube. The distance between the object to be detected and the sensing surface can be automatically determined. can be done. This makes attachment and detachment work extremely easy, reducing the number of man-hours required. Not only can it be reduced, but it is also securely locked, so it can be installed in places with a lot of vibration. There is no risk that the non-contact detector will be misaligned or detached from the holder. Also, contactless To install the detector, simply insert it into the holder and lock it, so it can be used for various types of non-contact detection. The device can be easily replaced.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view of an embodiment of a proximity switch according to the present invention.

FIG. 3 is a sectional view of an embodiment of the holder according to the present invention.

FIG. 4 is an explanatory diagram of the operation of the present invention.

FIG. 5 is an explanatory diagram of the operation of the present invention.

FIG. 6 is an explanatory diagram of the operation of the present invention.

FIG. 7 is an explanatory diagram of the operation of the present invention.

FIG. 8 is a sectional view of an example of a conventional proximity switch.

FIG. 9 is an explanatory diagram of the mounting structure of the proximity switch in FIG. 8;

[Explanation of symbols]

5 Detection coil 17 Cable 30 Proximity switch 31 case 32, 32a Locking piece 34, 34a Locking part 39 Male thread 40 Connector receiver 45 Sliding tube 49 Female thread 50,50a long hole 51, 51a Guide wall 52, 52a Thin wall part 60 connector 70 Holder 72 Engagement groove

Claims (1)

[Scope of utility model registration request] Claim 1: A cylindrical case having a rear opening having a locking portion protruding from the outer surface at a position L from the detection surface and a pair of locking pieces extending oppositely, and a screw at the rear. is established,
It consists of an inner cylinder accommodated in the case and forming a gap g between it and the case, a small diameter part slidably inserted into the gap g, and a large diameter part following the small diameter part, and at least the small diameter part has an elongated hole into which the locking piece of the case is inserted from the small diameter part to the large diameter part, and a thin wall between the rear end of the elongated hole and the large diameter part. a sliding cylinder provided with a part, and a detection part and a detection circuit part housed in the case and the inner cylinder; It has a non-contact detector filled with synthetic resin, and a cylindrical body that is open at both ends, has a screw on its outer periphery, and is fixed to a mounting member with a nut. The non-contact detector is inserted through the opening of the holder, and the locking part protruding from the locking piece is locked in the locking groove of the holder. A non-contact detector mounting structure in which the thin wall portion of the sliding tube is inserted between the locking piece and the inner tube by sliding the sliding tube.