JPH04112429U - Limit switch actuator - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to facilitate the installation of an actuator and improve assembly efficiency. [Structure] With the notch 5b formed in the arm set screw 5 and the rotating shaft mounting hole 3b formed in the base end of the lever 3 aligned, the rotating shaft mounting hole 3b is connected to the rotating shaft 2 of the switch body 1. In the actuator of the limit switch, which is assembled by fitting into the lever 3, a deformed head 5a is formed at one end of the arm set screw 5, and this head 5a is formed at one end of the screw insertion hole 3c of the lever 3. By fitting into the irregularly shaped recess 3d, the arm set screw 5 is prevented from rotating relative to the lever 3. This prevents the position of the notch 5b of the arm set screw 5 and the rotating shaft mounting hole 3b from shifting. Since there are no screws, the actuator can be easily assembled.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a limit switch actuator with improved assembly.

0002

[Conventional technology]

Generally, limit switches with lever or roller type actuators are As shown in Fig. 7, the base end of the lever c is aligned with the rotating shaft b provided on the switch body a. The lever is fixed by a set screw d, and a roller e is rotatably attached to the tip of the lever c. It has a supported structure.

0003 In addition, the arm set screw d that fixes the lever c to the rotating shaft b has a half-moon-shaped notch f on the shaft. is formed, and when attaching lever c to rotating shaft b, first connect this notch f and lever c. Align the rotating shaft mounting holes g of -c, and then align the rotating shaft mounting holes g with the rotating shaft in this state. After inserting lever c into one end of b and attaching lever c to rotating shaft b, tighten arm set screw d. The lever c is fixed to the rotating shaft b by tightening the nut h screwed into the lever. Ru.

0004

[Problem that the idea aims to solve]

However, in the actuator of the conventional limit switch mentioned above, Since the arm screw d is rotatable, the notch f of the arm set screw d is connected to the lever. Insert the rotating shaft mounting hole g into the rotating shaft b while aligning it with the rotating shaft mounting hole g in c. Even if you try to do so, the arm set screw f immediately rotates and the notch f and rotation shaft mounting hole g is misaligned, and the rotating shaft mounting hole g cannot be inserted into the rotating shaft b. this Conventionally, the positioning had to be re-aligned each time, which took a lot of time for assembly. In short, it had the disadvantage of poor work efficiency.

[0005] This idea was made in order to improve the above-mentioned conventional drawbacks, and it improved the ease of assembly. The present invention aims to provide an actuator for a mitt switch.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, this invention has a notch and a groove formed in the arm set screw. Attach the above rotating shaft while aligning the rotating shaft mounting hole formed at the base end of the bar. A limit that can be assembled by inserting the hole into the rotating shaft of the switch body. In the switch actuator, form a deformed head at one end of the above arm set screw. and fit this head into the irregularly shaped recess formed at one end of the screw insertion hole of the lever. This prevents the arm set screw from rotating relative to the lever. It is.

[0007]

[Effect]

This will cause the arm set screw notch and rotation shaft mounting hole to be misaligned during assembly. This makes assembly work easier.

[0008]

【Example】

An embodiment of this invention will be described in detail with reference to the drawings shown in FIGS. 1 and 2. Figure 1 Partially cutaway front view of the mitt switch, Figure 2 is an exploded perspective view of the actuator mounting part. shows.

[0009] In Fig. 1, reference numeral 1 denotes a switch body, which has a head portion 1a at the top, and this protrusion. A rotary shaft 2 is rotatably supported on the protruding portion 1b.

0010 One end of the rotating shaft 2 protrudes to the side of the head portion 1a, and a groove 2 is formed at the tip. a, and a knurling 2b is formed on the outer peripheral surface, and the tip of this rotating shaft 2 is A lever 3 constituting an actuator can be attached.

[0011] A roller 4 is rotatably supported at the tip of the lever 3 via a shaft 3a. At the same time, a rotating shaft mounting hole 3b is provided at the base end of the lever 3 in a direction parallel to the shaft 3a. is drilled, and this rotating shaft mounting hole 3b can be inserted into one end of the rotating shaft 2. This allows the lever 3 to be attached to the rotating shaft 2.

0012 On the other hand, at the base end of the lever 3, there is a A screw insertion hole 3c is bored in a direction perpendicular to the rotating shaft mounting hole 3b. An arm set screw 5 is inserted into the same insertion hole 3c.

[0013] The arm set screw 5 has an irregularly shaped, for example, hexagonal head 5a formed on one end side. The head 5a is inserted into the irregularly shaped recess 3d formed at one end of the screw insertion hole 3c. It can be inserted.

[0014] In addition, the head 5a is inserted into the irregularly shaped recess 3d of the lever 3 in the middle part of the arm set screw 5. When in the fitted state, there is a half-moon-shaped notch 5b at a position that matches the rotating shaft mounting hole 3b. is formed, and a threaded portion 5c is formed on the other end side of the arm set screw 5. A double nut 7 is screwed into this threaded portion 5c via a spring washer 6. .

[0015] Next, to explain the operation, when attaching the lever 3 to the rotating shaft 2 of the switch body 1, First, insert the head 5a of the arm set screw 5 inserted into the screw insertion hole 3c of the lever 3. It fits into the irregularly shaped recess 3d and prevents the upper arm screw 5 from rotating with respect to the lever 3. child At this time, the shape of the arm set screw 5 is determined by the position where the head 5a is inserted into the irregularly shaped recess 3d. Since the notch 5b made may not match the rotary shaft mounting hole 3b, the notch 5b Fit it into the irregularly shaped recess 3d of the head 5a with the rotating shaft mounting hole 3b aligned with the rotating shaft mounting hole 3b. .

[0016] In this state, insert the rotating shaft mounting hole 3b of the lever 3 into one end of the rotating shaft 2. . At this time, the arm set screw 5 does not rotate, so the arm set screw 5 is turned off. The position of the cutout 5b and the rotating shaft mounting hole 3b does not shift, making it easy to assemble. can.

[0017] After attaching the lever 3 to the rotating shaft 2, tighten the nut 7 of the arm set screw 5. As a result, the inner circumferential surface of the notch 5b is pressed against the knurling 2c of the rotating shaft 2, so that the rotation The lever 3 can be fixed to the shaft 2.

[0018] In the above embodiment, the head 5a of the arm set screw 5 is hexagonal, but it is shown in FIG. In this case, the irregularly shaped recess 3d of the lever 3 is also shaped like this head. 5a.

[0019] As mentioned above, if the head 5a is made almost triangular, the vertical direction is determined, so simply Just by fitting the head 5a into the irregularly shaped recess 3d, it can be rotated with the notch 5b of the arm set screw 5. The shaft mounting holes 3b can be aligned.

[0020] Furthermore, as shown in FIG. 4, the head 5a of the arm set screw 5 is wedge-shaped and split. By providing the groove 5d, when the nut 7 is tightened, as shown in FIGS. 5 and 6, Since the wedge-shaped head 5a is crimped into the opening of the screw insertion hole 3c, the arm set screw 5 can be prevented from rotating and falling off at the same time.

[0021]

[Effect of the idea]

As detailed above, this idea is based on the arm set screw that fixes the lever to the rotating shaft. The head is an irregular shape, and this head is an irregular recess formed at one end of the screw insertion hole of the lever. Since the lever fits into the rotating shaft, the arm set screw is does not rotate.

[0022] This allows the lever's rotating shaft mounting hole to be easily inserted into the rotating shaft, making it easy to assemble. The work can be done in a short time, and the ease of assembly can be greatly improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a limit switch equipped with an actuator according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the actuator mounting section.

FIG. 3 is an explanatory diagram showing another embodiment of the actuator mounting section.

FIG. 4 is an explanatory diagram showing another example of an arm set screw for attaching an actuator.

FIG. 5 is a side view of the device in use.

FIG. 6 is a front view of the same.

FIG. 7 is an explanatory diagram showing an actuator of a conventional limit switch.

[Explanation of symbols]

1 Switch body 2 Rotating axis 3 Lever 3b Rotating shaft mounting hole 3c Screw insertion hole 3d irregularly shaped recess 5 Arm set screw 5a Head 5b Notch

Claims (1)

[Scope of utility model registration request] [Claim 1] With the notch formed in the arm set screw aligned with the rotary shaft mounting hole formed at the base end of the lever, the rotary shaft mounting hole is inserted into the rotary shaft of the switch body. In the actuator of the limit switch, which is assembled by forming an irregularly shaped head at one end of the arm set screw, and fitting this head into an irregularly shaped recess formed at one end of the screw insertion hole of the lever, A limit switch actuator that prevents the arm set screw from rotating relative to the lever.