JPH0437159Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a handrail provided on the wall surface of a bathroom, a washroom, a toilet for the physically disabled, etc., for example.

[Conventional technology]

Handrails installed in bathrooms and the like most commonly have a structure in which a plurality of pipes, mainly made of stainless steel or the like, are connected and the combined pipes are fixed to a wall surface with a bracket.

In addition, the pipe connection structure includes, for example, one in which a socket for fitting the end of the pipe is used, a screw inserted in the radial direction is screwed into the socket, and the screw is pressed against the circumferential surface of the pipe to fix it. In addition, it is also possible to connect by threading the end of the pipe and using a socket with a female thread on the inner periphery, or by using a nipple or the like.

[Problem that the invention attempts to solve]

Instead of such handrails using metal tubes, handrails with a two-layer structure have come to be used, in which a metal tube is used as an inner tube and a sleeve made of synthetic resin is integrated around the inner tube. In this structure, since the sleeve is made of synthetic resin, the elasticity of the material has a cushioning function.
Even if you accidentally apply strong force with your arm, etc., there is no risk of injury or bruises.

However, since the sleeve is simply inserted around the outer periphery of a metal tube and fixed with an adhesive, the adhesive deteriorates rapidly over time, especially when used in a hot and humid bathroom. This allows the sleeve to rotate around the metal tube as the effectiveness of the adhesive diminishes. In this case, since the handrail is used to support the person's body, the rotation of the sleeve when grasped by the hand gives the person a very uneasy feeling. In addition, if the grip is repeated frequently, the sleeve on the surface remains twisted, which is undesirable in terms of appearance.

Therefore, an object of the present invention is to provide a structure in which a synthetic resin sleeve is integrated around a metal tube so that the sleeve does not rotate.

[Means for solving problems]

In order to achieve the above object, the handrail of the present invention is a handrail in which a sleeve made of synthetic resin is integrated on the outer periphery of an inner tube made of metal, and the sleeve is attached to the outer circumferential surface of the inner tube and on the inner surface of the sleeve. A plurality of protrusions having a shape capable of biting are arranged in the circumferential direction, and the protrusions have a shape in which the length in the axial direction of the inner tube is larger than the width in the circumferential direction.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 1 is a partially cutaway plan view of a handrail showing an embodiment of the present invention.

The handrail is constructed mainly of two straight pipes 1, a pair of curved pipes 2 connected to the ends of these pipes, and a bracket 3 disposed at a portion connecting the straight pipes 1. A flange 4 is connected to a portion of the curved pipe 2 facing the wall surface A with screws 4a, and this flange 4 is fixed to the wall surface A with screws or the like.
Note that 11 is a cover provided to hide the flange 4.

The bracket 3 is attached to the wall surface A as in the case of the curved pipe 2.
A flange 3a is fixed to the opposite portion of the wall A with screws 3b, and the flange 3a is fixed to the wall surface A by this flange 3a. The flange 3a is hidden by a cover 3c having a slit. This bracket 3 is made of hard synthetic resin, and has a connector portion for connecting the straight pipe 1 at its tip end. This connector portion is formed as a bolt shaft 5, with male threads 5a protruding from both ends thereof.

The straight pipe 1 is composed of an inner pipe 6 using a stainless steel pipe inside and a synthetic resin sleeve 7 integrated with the outer peripheral surface of the inner pipe 6. On the other hand, the bent pipe 2 is a solid body having a female thread 2a formed at its end, and is made of hard synthetic resin such as polyamide.

FIG. 2a is an enlarged vertical sectional view showing both ends of the inner tube 6 and the sleeve 7, and FIGS. 2b and 2c are sectional views taken along the - line and the - line arrow position in a.

Bushes 8 are fitted into both ends of the inner tube 6, respectively. Then, when joining the bent pipe 2 to the straight pipe 1 and the end thereof, a convex part 6a is formed on the inner periphery of the inner pipe 6 by caulking so that these bushings 8 do not rotate together. Figure b).

Further, inside the bush 8, a female thread 8a is formed in the axial direction. And this female screw 8a
The male thread 5a of the bolt shaft 5 provided on the bracket 3
By screwing them together, the straight pipes 1 are joined together via the bracket 3. Further, the female threads 8a of the bushes 8 at the left and right ends and the female threads 2a of the curved pipe 2 are connected by a fully threaded bolt 9.

Here, the sleeve 7 integrated with the outer periphery of the inner tube 6
is fixed by extrapolating the inner tube 6. A protrusion 10 is provided on the circumferential surface of the inner tube 6 to fix the sleeve 7 to the inner tube 6 so as not to rotate. The protrusion 10 is
They are located at both ends of the inner tube, and are formed in four locations as shown in Figure 2c. These protrusions 10 can be formed by partially compressing the circumferential surface of the inner tube 6 with a tool, and making use of the deformation to make the protrusions protrude outward. The protrusions 10 are processed in a manner similar to knurling, with their longitudinal ends pointing in the axial direction.

In this way, when the inner diameter of the sleeve 7 is made almost equal to the outer diameter of the inner tube 6 by providing the protrusion 10 whose longitudinal direction is oriented in the axial direction on the circumferential surface of the inner tube 6,
When the sleeve 7 is inserted, the portion of the sleeve 7 corresponding to the protrusion 10 is elastically deformed. Therefore,
Due to this elastic deformation, the sleeve 7 is firmly fixed around the inner tube 6, and no adhesive or the like is required.

Further, since the protrusion 10 bites into the inner periphery of the sleeve 7, the sleeve 7 is also restrained in the circumferential direction. Therefore, even if the sleeve 7 is grasped by hand, the sleeve 7 will not rotate around the inner tube 6. Therefore, since the sleeve 7 always remains stationary, it can be used safely and will not be twisted.

Furthermore, the sleeve 7 on the outer periphery of the straight pipe 1 is made of synthetic resin, and the bent pipe 2 and the central bracket 3 are also made of synthetic resin. Therefore, the entire handrail is elastic, and even if your body bumps into it during bathing or the like, you can avoid the risk of bruises or the like.

[Effect of idea]

As explained above, in the handrail of the present invention, a protrusion with a longitudinal direction facing the axial direction of the inner tube is provided on the outer periphery of the metal inner tube, and a synthetic resin sleeve is inserted outside the inner tube. This protrusion is made to bite into the inner wall. Therefore, by simply inserting the sleeve into the inner tube, the two can be integrated without the need for an adhesive or the like, which simplifies manufacturing. In addition, the protrusions are arranged on the circumferential surface around the inner tube, and the protrusions restrain the entire circumference of the sleeve, so even if you try to twist it up by hand, the sleeve will remain in its original position. No twisting or wrinkles. Therefore,
It is possible to maintain a good appearance at all times and to use the product in a sanitary manner without the accumulation of dirt due to wrinkles.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a handrail showing an embodiment of the present invention, and FIG. 2 is a sectional view of the main part. 1... Straight pipe, 2... Bent pipe, 3... Bracket,
4...Flange, 5...Bolt shaft, 6...Inner pipe,
7...Sleeve, 8...Button, 9...Bolt, 10...Protrusion, 11...Cover.

Claims (1)

[Scope of utility model registration request] A handrail with a synthetic resin sleeve integrated on the outer periphery of a metal inner tube, the outer circumferential surface of the inner tube having:
A plurality of protrusions having a shape capable of biting into the inner surface of the sleeve are arranged in the circumferential direction, and the protrusions have a shape such that the length in the axial direction of the inner tube is larger than the width in the circumferential direction. Features a handrail.