JPS58184026A - Fixing of tubular body - Google Patents

Abstract

PURPOSE:To fix a tubular body quickly and surely by simple process by inserting a tubular body into inserting holes pierced in facing walls of a cylindrical body and expanding the tubular body by compressing it from both ends to the center. CONSTITUTION:For instance, an antenna element is fixed to an arm in the following way. An antenna element 3 is inserted into inserting holes 32, 32 pierced in facing walls of an arm made of plastics. The arm 30 is then placed on receptacles 26, 26 and the element 31 is positioned between open holding pieces 8a, 11a and 8b, 11b. Hydraulic cylinders 14a, 14b are driven, and the part of the element 31 exposed to outside of the arm is held by pieces 8a, 11a and 8b, 11b. A hydraulic cylinder 23 is driven and a holding device 3A is moved in the direction to approach to a holding device 3B, and the element 31 is compressed in axial direction. The part of the element 31 which is not held between pieces 8a, 11a and 8b, 11b is expanded by this compressing operation, and the element 31 is fixed to the arm 30.

Description

[Detailed description of the invention] The present invention relates to a method of fixing a tubular body to a cylindrical body.

Conventional methods for fixing a pipe-shaped antenna element to an arm having a pipe-like or U-shaped cross section include driving nails or inserting a jig into the antenna element to partially enlarge the diameter of the antenna element. However, the former requires labor to process and is unfavorable in terms of appearance, while the latter requires a jig to be inserted into the thin antenna element one by one, resulting in low productivity.

This invention has been made in view of the above points, and aims to provide a tubular body fixing method that can quickly and reliably fix a tubular body to a cylindrical body through a simple process, has high productivity, and is easy to automate the device. It is something.

However, in this invention, the tubular body is inserted into a tubular body insertion hole bored in the opposing wall portions of the tubular body, and the tubular body exposed to the outside of the tubular body is inserted into both sides of the tubular body. They are each held by holding members, and then the holding members are driven in a direction to shorten the distance between the holding members to compress the tubular body in the axial direction, thereby inflating the tubular body between the parts held by the holding members. This is a tubular body fixing method characterized by fixing a tubular body to a cylindrical body.

In this invention, the cylindrical body includes not only a cylinder and a rectangular cylinder, but also
It also includes a cylindrical body whose cross section is partially open to the side, such as a semi-cylindrical member or a member having a U-shaped or U-shaped cross-sectional shape.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is an antenna element fixing device, which includes a base 2, a clamping device 3A attached to the base so as to be slidable in the direction of the arrow X, a clamping device 3B fixed to the base, and a clamping device 8A indicated by the arrow. It consists of a drive device 4 that drives in the X direction. Clamping device 3A
is a hydraulic chuck, in which a clamping piece 8a having a groove 7a with a semicircular cross section is fixed to a pedestal 6a fixed to one end of the substrate 5a, and a clamping piece 8a having a groove 7a with a semicircular cross section is fixed onto the substrate 5a in the direction of arrow Y (orthogonal to arrow X). A clamping piece 11a having a groove 10B having a semicircular cross section is fixed to the moving block 9a, which is slidably mounted in a direction (direction), so as to face the clamping piece 8a. Reference numeral 12 denotes a claw having an L-shaped section 1.1 plane, the base of which is fixed to the moving block 9a, the tip of which is engaged with a guide groove 18 provided on the substrate 5a, and the claw 12 moves the moving block 9a in the direction of the arrow Y. It is not meant to guide you. 14B is a hydraulic cylinder, which is mounted between the movable block 9a and a fixed block 15B provided at the other end of the substrate 5a.

In addition, the tips of claws 16 having a cross-section shaped like an angular shape and whose bases are fixed to the substrate 5a are engaged with guide grooves 17 provided in the base 2, thereby allowing the clamping device 8A to move freely in the direction of the arrow X. being guided. On the other hand, the holding device 3B holds the substrate part on the base 2.
It has the same structure as the clamping device 3A except that it is fixed to the clamping device 3A, and corresponding parts are shown with the suffix b instead of a. The drive device 4 has one end held by the clamping device 3A.
The other ends of the two rods 20 fixed respectively to the pedestal 6a and the fixed block 1fll are connected to the connecting arm 21,
A hydraulic cylinder 28 is mounted between this connecting arm and the front wall 22 of the base 2. Note that the rod 20 has holes 24, 25, 11, .
It is slidably inserted inside. Further, 26 is a receiver having a V-groove in its upper part, and is fixed to the base 2 upright.

Next, a method of fixing the antenna element to the arm using the device having the above configuration will be described.

First, element insertion holes 82, 82, which are slightly larger than the outer diameter of the pipe-shaped antenna element 81, are bored in the opposing walls of the plastic arm 80, and the antenna element 81 is inserted into the element insertion holes. Next, attach this arm 80 to the receiver 26.2.
6, and the antenna element 81 is positioned between the open holding pieces 8a, 118 and 8b, llb. (
The state shown in FIG. 4A. ) Note that the antenna element 81 is positioned using an appropriate stopper (not shown) or the like. Further, the antenna element 81 may be inserted into the element insertion hole 82 with the arm 30 set on the receiver 26. Next, the hydraulic cylinder 14a114b is driven to hold the clamping piece 8.
a, 11a and 8b, 11b, the antenna element 8
Connect the exposed outside part (outer diameter part) of arm 1 to arm 8.
0 on both sides. (The state shown in FIG. 4B.

) In this state, the side surfaces of the clamping pieces 8b and llb are almost in contact with one side of the arm 80, while the side surfaces of the clamping pieces 8a and tta are in a position with a small gap 8 between them and the other side of the arm 80. . Next, the hydraulic cylinder 28 is driven to drive the clamping device 8A in a direction approaching the clamping device 8B, and the antenna element 8
The clamping pieces 8a and 11B holding the antenna element 81 are driven by a distance approximately equal to the gap 8 to compress the antenna element 81 in the axial direction (the longitudinal direction of the antenna element). (The state shown in FIG. 4C.) As a result, the clamping pieces sa, tta and the clamping pieces 8b,
The portion of the antenna element that is not clamped between the 1 lb. portions is deformed and swells, and the antenna element 81 is fixed to the arm 80. If the hydraulic cylinders 14B, 14b are driven in the opposite direction to release the clamping of the antenna element 31 by the clamping pieces and the clamping device 8A is returned to its original position, the antenna element 81 will be attached to the arm 30 as shown in the fourth diagram. The fixed work process is completed. Although the antenna element 81 may have four parts locally due to compression in the axial direction, the other parts swell and can be fixed to the arm 80 without any problem. Note that in order to suppress the occurrence of this recess, a rod having an outer diameter slightly smaller than the inner diameter of the antenna element 31 may be coated with lubricant and inserted into the antenna element 31, and then removed after the above-mentioned fixing operation. good.

In the above embodiment, a hydraulic cylinder was used as the drive source for each part of the device, but other drive sources such as an electric type may be used, and configurations other than those described above may be used, such as using a three-way jaw chuck as a mechanism for holding the antenna element. An antenna element fixing device may also be used. In particular, productivity can be further improved by using a device that simultaneously holds and compresses a plurality of antenna elements.

In the above embodiment, when the antenna element is held by the holding pieces (FIG. 4B), there is almost no clearance between the sides of the negative side holding pieces 8b and llb and the arm 80, but as shown in FIG. For example, a gap of S/2 is provided between the clamping pieces on both sides of the arm 300, and then both clamping devices 8A and 8B are driven toward the center of the arm 80 to move the antenna element 81 in the axial direction. It may be compressed, and furthermore, at the completion of this compression process, one side of the clamped
111 and the arm 80, and the bulge 88 of the antenna element 81 may be formed on one or both sides of the arm 80, as shown in FIG.

In order to control variations in the shape of this bulge, as shown in FIG. If the antenna element 81 is made to bulge along the lines, a favorable appearance can be obtained.

Although the method for fixing an antenna element to a pipe-shaped plastic arm has been described above, the present invention can also be applied to arms having shapes other than pipe shapes or made of materials other than plastic. For example, in the case of an arm having a U-shaped cross section, the arm 8 as shown in FIG.
The element insertion hole 32 may be bored in the wall portions 35 and 35 facing each other, and the antenna element 81 may be fixed in the same manner as described above. Furthermore, the present invention is applicable not only to the case of fixing an antenna element to an arm but also to the case of fixing a tubular body to a cylindrical body in general.

・1 (As explained above, according to the present invention, the tubular body can be quickly and reliably fixed to the cylindrical body through a simple process of clamping the tubular body and compressing it with a short stroke in the axial direction, thereby increasing productivity. The efficiency is high and the equipment can be easily automated.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of an apparatus for carrying out the method of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a side view taken along arrow A-A in Fig. 2, and Fig. 4 is A. -D are explanatory diagrams of an embodiment of the method of this invention, and FIGS. 5 to 8 are diagrams each of which are explanatory diagrams of other embodiments of the method of this invention. 1... Antenna element fixing device, 3A... Clamping device,
8B... Holding device, 4... Drive device, 8a, 8b.
...Holding piece, lla, llb...Holding piece, 14B, 1
4b...Hydraulic cylinder, 20...Rod, 21...
- Connecting arm, 28... Hydraulic cylinder, 80... Arm, 31... Antenna element, 82... Element insertion hole, 8
5...Wall part. Applicant Makita Co., Ltd. Agent Akira Inui Yuji Figure 3 Figure 5 Figure 8'::・35 Procedural amendment document 1981 6J13/1981 Patent No. 66982 No. 3, Person making amendment case Relationship: Patent Applicant Take 11', Nuki 2-114 Todoseicho, 4'a'A City, Aichi Prefecture
Address 1 Name: Makita Co., Ltd. Representative Hideharu Makita 4, Agent 〒460 6 Number of inventions increased by amendment None 8 Contents of amendment (1) " Correct the "three-way jaw chuck" as follows. Insert the following sentence in the 8th line of page 7 of the specification after ``...Improve.'' ``In the form of tightening a three-jaw chuck, collet chuck, or half-split sleeve with a torque clamp.''"Also, a device may be used in which a portion of the antenna element exposed from the arm, covering almost the entire length, is held by a holding piece."

Claims (1)

[Claims] 1. Insert the tubular body into a tubular body insertion hole drilled in the opposing walls of the cylindrical body, and insert the tubular body exposed outside the cylindrical body on both sides of the cylindrical body. the tubular body between the clamping parts by the clamping members, and then compressing the tubular body in the axial direction by driving the clamping members in a direction that shortens the distance between the clamping members. A tubular body fixing method characterized by fixing the tubular body to a cylindrical body by inflating the tubular body. 2. The method for fixing a tubular body according to claim 1, wherein the tubular body is an antenna element and the cylindrical body is an arm.