JPH0546446B2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention is useful for fixing both members together by inserting a shaft-shaped insertion member into a hole in an appropriate assembly member such as a side plate or a frame. The present invention relates to a fixed locking member.

Prior Art For example, when assembling and fixing the end of an insertion member such as a shaft into a hole of an assembly member such as a frame, one of the fixing means is one having a structure as shown in Figs. 1 and 2. has been adopted.

In the figure, 1 is a guide rod (in charge of the insertion member) that guides the movement of a carriage with a printing function in a printer, for example. Assembly hole 3 of frame (in charge of assembly parts) 2
and is fixed with a locking member 4.

The guide rod 1 for the frame 2 is loosely inserted into the assembly hole 3.
must be inserted into the sliding hole of the carriage (not shown).

In this case, if the guide rod 1 and the assembly hole 3 are tightly fitted, the surface of the guide rod in contact with the sliding part may be damaged by the edge of the assembly hole 3 during assembly or disassembly. The disadvantage is that it is easy. For this reason, the assembly hole 3 is usually provided loosely as shown in the figure.
The tip of the rigid locking member 4 is pressed against the surface of the guide rod 1 and the locking member 4 is fixed to the frame 2 with the screw 5, and the so-called guide rod 1 is connected to the locking member 4 and the hole 3.
It was fixed by sandwiching it between a part of the FIG. 3 shows a modification of the locking member 4a, which has the same function as the locking member 4 described above.

However, as the printer operates, the carriage slides along the guide rod 1 that is parallel to the platen, and because high-speed printing is performed, these vibrations cause damage to the guide rod 1, the frame 2, and the holders. There was a problem in that the tightening of the screw 5 was likely to loosen due to the transmission to the locking member 4, and the fixation of the guide rod 1 by the locking member 4 was likely to loosen.

On the other hand, ways to deal with the above problems include increasing the number of screws 5 that secure the locking member 4 or increasing the tightening torque of the screws 5 in order to prevent the screws 5 from loosening due to vibration or changes over time. or
It is necessary to apply a loosening agent to the screws 5. However, these measures do not lead to a solution that sufficiently enhances the fixation of the guide rod 1.

Purpose This invention was made in view of the above, and its purpose is to significantly increase the holding pressure of the member that fixes the locking member while maintaining elasticity due to the flexible portion and curvature, and the loosening prevention torque of the tightening screw. The objective of the present invention is to develop a fixing locking member that is configured to further increase the pressing force of the fixing member by flattening the deflection that occurs when the screw is tightened.

Configuration Next, the present invention will be described based on embodiments shown in the drawings.

In FIG. 4, the locking member 10 is formed by processing a resilient plate material, and mainly includes a tip 12 that is brought into pressure contact with the circumferential surface of an insertion member 11 such as a guide rod to be assembled, and a tip 12 that is pressed against the tip 12. A flexible portion 13 that can elastically apply pressure, a base 14 connected to the flexible portion 13, and a portion of the base 14 connected to the base 1.
Assembly member 15 such as a frame to which 4 is attached
It consists of a stopper 16 that can be engaged with the side. Reference numeral 17 denotes a mounting hole for the locking member 10, which is provided in the base 14 between the stopper 16 and the tip 12. Moreover, this locking member 10 is
As shown in FIG. 5, a locking member 10 is provided with a flexure 18 whose central portion is curved outward over almost the entire length, and is fixed to an assembly member 15 with a screw 19.
The mounting hole 17 portion is configured to float above the surface of the assembly member 15.

Note that since the stopper 16 in the above embodiment is formed of a hole, a pin-shaped protrusion 20 is provided on the assembly member 15 side at a position corresponding to the stopper 16.
is provided. Further, the assembly hole 21 shown in FIGS. 6 and 7 is the same hole as in the conventional example.

On the other hand, the stopper 16 is formed into a protruding shape as shown in FIG.
may be provided. Alternatively, this engagement relationship may be achieved by providing a stopper 16b on the assembly member 15 side, for example as shown in FIG. 8b, and engaging the end edge 14b of the base 14 with this stopper 16b.

Further, although the insertion member 11 shown in FIGS. 6 and 7 is provided with a groove 22 in which the locking member 10 can engage, this is not necessarily required.

On the other hand, in the locking member 10 in the above embodiment, the tip portion 12 that presses the insertion member 11 is located in the assembly hole 20.
Although a plurality of tip portions 12a are shown in both areas symmetrical with respect to the center position of the insertion member 11 to be inserted into the body, for example, as shown in FIGS. 9 and 10, there may be only one tip portion 12a. Furthermore, the flexible portion 13 may also be provided in the direction in which the base portion 14 protrudes, as shown in 13a shown in FIG.

Effects As described above, the fixing member of the present invention is capable of fixing the member inserted into the hole of the assembly member by elastically biasing the force that presses the insertion member through the intervention of the flexible portion, and furthermore, The locking member is configured to be bent in a direction that allows it to be extended in a direction that further increases the pressing force upon attachment.

Thus, as shown in FIG. 6, the locking member is temporarily attached to the assembly member via the stopper, and the insertion member to be combined is pressed and held in the hole of the assembly member by the retaining force of the locking member. Next, as shown in FIG. 7, the locking member is fastened to the assembly member with a screw,
The flattening of the locking member increases the pressing force.

Therefore, as the locking member is attached, the pressing force of the insertion member to be fixed can be effectively increased, and the insertion member can be firmly fixed in the hole of the assembly member.

Further, the above-mentioned tightening screw also has the same effect as if a strong spring washer was used through the elastic restoring force of the bent locking member, and the effect of preventing loosening can be obtained at the same time.

As described above, according to the present invention, the locking member that presses and holds the member inserted into the hole of the assembly member from the side can increase the pressing force that presses and holds the insertion member as the locking member itself is fixed. Moreover, the increase can be achieved precisely by assembling the locking member, which is extremely simple.

Therefore, the present invention is particularly convenient for use in assembling various devices as well as printers, has a simple structure, and is extremely easy to install or remove.

Furthermore, in this invention, elasticity can be added not only to the insertion member of the locking member, but also to the screw that fixes the locking member, so that vibrations and shocks that occur afterwards will not cause these to loosen. do not have.

Although this invention has mainly been described with reference to fixing the insertion member to the assembly member, the same effect can be obtained even if the same structure is used as a means for assembling the assembly member to the insertion member.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is a side view of the same,
FIG. 3 is an explanatory diagram of another example of the conventional example, FIG. 4 is a front view of a locking member showing an embodiment of the present invention, and FIG.
6 and 7 are explanatory diagrams for assembling the locking member, FIGS. 8a and 8b are explanatory diagrams showing other examples of the stopper, and FIGS.
FIG. 10 is an explanatory diagram of another example of the locking member. 10... Locking member, 11... Insertion member, 12,
12a... Tip part, 13, 13a... Flexible part, 1
4... Base, 15... Assembly member, 16, 16
b...Stopper, 17...Mounting hole, 18...
...deflection.

Claims (1)

[Claims] 1. A locking member that presses and holds the surface of the member to be loosely inserted into the assembly hole from the side of the assembly member,
It is composed of a tip that contacts the insertion member, a flexible portion that can apply a pressing force to the tip, and a base that is connected to the flexible portion.In addition to providing a mounting hole in the base, it also prevents the movement of the locking member. A fixed locking member that is provided with a restricting stopper and has a flexure added to the locking member so that it can be flattened in the pressing direction when tightened when the insertion member is fixed.