JPH0657701U - Guide rollers for chains for multilevel parking systems - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a chain for a multi-level parking device that suppresses the generation of noise. A guide roller of a chain for a multi-level parking device having a bearing 2 fixed to an inner peripheral surface of a roller body 1 is characterized in that the roller body 1 is formed by injection molding a thermoplastic resin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chain used in a multilevel parking apparatus for parking and storing a vehicle or the like, and more particularly to a guide roller used in the chain.

[0002]

[Prior art]

 Conventionally, chains for multi-level parking systems have attachment link plates that suspend the vehicle cage and link plates that can be bent flexibly by connecting pins, and guide rollers can be attached to the outside of both link plates at both ends or one end of the connecting pins. I was wearing. Then, the chain was stretched over sprocket wheels installed on the upper and lower parts, and the guide rollers were held by guide rails installed vertically between the two sprocket wheels to run the chain. . The guide rails were made of steel, and the guide rollers were also used by inserting bearings into the steel roller body. However, in recent years, parking places, especially in urban areas, have become a social problem, and vertical multi-story parking systems, which do not require a lot of land area, have rapidly spread in response to them. And multi-level parking systems constructed in urban areas are required to have low noise.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional chain for a three-dimensional parking apparatus, since the guide roller is made of steel and the guide rail is also made of steel, there is a problem that a large noise is generated due to the collision between the two. It is an object of the present invention to provide a chain for a multi-level parking device that reduces the above-mentioned problems and suppresses the generation of noise.

[0004]

[Means for Solving the Problems]

 The present inventor has conducted extensive research to achieve the above-mentioned object, and when a roller body is formed by compression molding a thermosetting resin such as unsaturated polyester containing glass fiber or phenol containing cloth chips, heat treatment such as polyamide is used. When a roller body is formed by casting a plastic resin into a round bar and performing a total cutting process, when a thermoplastic resin such as polyamide is extruded into a round bar and then a total cutting process is performed to form a roller body, a glass fiber containing Thermosetting resin such as saturated polyester or phenol with cloth chips is compression molded, and thermoplastic resin such as polyamide or polyacetal is injection molded on the surface layer. When a roller body is formed by injection molding a thermoplastic resin such as, the roller body is formed by compression molding a thermosetting resin such as urethane rubber. If the like, cost, abrasion resistance, compression resistance, impact resistance, Noise, measured vibration, and completed the present invention by comparing them with the conventional products. That is, the present invention relates to a guide roller of a chain for a three-dimensional parking device having a bearing fixed to the inner peripheral surface of the roller body, wherein the roller body is formed by injection molding a thermoplastic resin. It is a guide roller for a device chain.

[0005]

【Example】

 An embodiment of the present invention will be described below. FIG. 1 shows an embodiment of the present invention. This guide roller comprises a roller body 1 and a bearing 2 press-fitted on the inner peripheral surface of the roller body 1. In the figure, 3 is a connecting pin, and 4 is a guide rail. The roller body 1 is made of fiber-free polyamide resin according to the process shown in FIG. That is, after confirming the raw materials, injection molding was performed with a molding machine set to the specified conditions, the product was released by cooling and annealed with a dryer to remove internal stress. Then, gate processing and bearing press-fitting were performed, and a commercially available ball bearing 2 was press-fitted to obtain a guide roller. Further, as shown in FIG. 2, a film gate 5a was used for the gate portion of the mold 5. The film gate is used because it does not generate a weld line. In this embodiment, the annealing treatment is performed to remove the internal stress of the molded product, but hot water treatment may be performed instead of the annealing treatment.

The guide rollers were then tested with a guide roller tester. Fig. 4 shows the results of this test, and the amount of wear increased at a substantially constant gradient, and after 1500 hours of operation (equivalent to two years in an actual machine), the amount of wear was about 0.085 mm, which was extremely small. It was also confirmed that the surface temperature of the guide roller did not rise at all, and it was found that the guide roller was sufficiently practical.

Therefore, the guide roller was incorporated into a chain for a multilevel parking device and used in an actual multilevel parking device. As a result, it was confirmed that the wear of the guide rollers was negligible. In addition, the guide roller surface was slightly scratched due to the gaps and steps in the seams of the guide rails, but it was confirmed by color check that the scratches were very shallow. Furthermore, no deformation or indentation due to impact load was found in the drive section chain guide entry part, and no adverse effect on the guide roller flange part due to the thrust load when the car was put in or taken out.

Table 1 shows the measurement results of the noise in the actual machine, and the table also shows the noise of the conventional steel guide roller. In the table, A is the center of the drive unit machine base, B is the drive unit chain guide entry part, C is the chain guide middle straight line part, D is the driven part chain guide release part, and E is the position 1 m above the tower inner floor. The most noisy places in the multi-level parking system are the drive unit chain guide entry part B and the chain guide intermediate straight line part C. The noise level in the fully filled state was 79 dB at the median in the conventional example. In the example, a noise reduction of 2 dB is achieved. In addition, the noise reduction effect is greatest in the driven part E where the person who is the target of noise enters and leaves, and the noise reduction is 4 dB at the median value when the vehicle is completely full. The minimum value is reduced by 7 dB.

[0009]

[Table 1]

Table 2 shows the vibration acceleration in comparison with the conventional example. According to the present embodiment, the effect of reducing the vibration acceleration is greatly reduced by 42% at the drive-in chain guide entry portion B where the impact is greatest. As a result, a comprehensive noise reduction effect can be expected due to vibration damping at the drive part, which is the main noise source of the multilevel parking system.

[0011]

[Table 2]

[0012]

[Effect of device]

 The present invention provides a guide roller for a chain for a multi-level parking device that can be practically used and at the same time reduce noise.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an embodiment of the present invention.

FIG. 2 is a plan sectional view showing an injection molding machine.

FIG. 3 is a process diagram showing a manufacturing process.

FIG. 4 is a diagram showing a result of measuring an amount of wear by a testing machine.

[Explanation of symbols]

1 ... Roller main body 2 ... Bearing 3 ... Connection pin 4 ... Guide rail 5 ... Mold 5a ... Film gate

Claims (3)

[Scope of utility model registration request] 1. A guide roller of a chain for a three-dimensional parking apparatus having a bearing fixed to an inner peripheral surface of the roller body, wherein the roller body is formed by injection molding a thermoplastic resin. Chain guide roller. 2. The guide roller for a chain for a multilevel parking apparatus according to claim 1, wherein the injection molding of the roller body is performed by arranging a film gate on an inner peripheral surface of the roller body. 3. The guide roller for a chain for a multilevel parking apparatus according to claim 1, wherein the thermoplastic resin is polyamide.