JPH0634013U - Hydraulic movable crown device for screen device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a crown device which can be greatly labor-saving driven by a hydraulic motor or the like without using human power to operate the crown device. [Structure] In a crown device using a turnbuckle for expanding and contracting the left and right screen frames 3 and 4 in the upper part of a bent portion of the screen device, a turnbuckle 9 is used as a hydraulic motor. -Ta 16 to Sprocket 2
1, 10 and a chain 22 while the hydraulic motor 16 is moved in accordance with the movement of the turnbuckle 9 along a shaft 19 provided between the left and right screen frames 3 and 4. It is mounted so that it can slide freely in any direction, and is automatically positioned by the movement of the turnbuckle 9. Then, the disk 11 fixedly mounted on the turnbuckle 9 and the guide 23 attached to the hydraulic motor side are engaged with each other to interlock with the movement of the turnbuckle 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The screen device mounted on the asphalt finisher or the like is provided with a crown device for bending the screen device in the transverse direction of the pavement. The present invention relates to the improvement of this crown device.

[0002]

[Prior art]

 A leveling machine such as an asphalt finisher scatters the asphalt composite material to the rear of the vehicle body while traveling, and compacts and spreads the asphalt mix material spread by a screen device. By the way, it is necessary to pay attention to the following points when carrying out leveling work related to, for example, road paving work with such an asphalt finisher. That is, roads are usually provided with slopes (called “crowns”) that take the drainage of rainwater and other factors into consideration so that the central part of the road width is high and both ends are low. The crown is formed by making the screen device bendable in the vertical direction from a substantially central portion in the longitudinal direction.

Conventionally, since such bending work has been performed by manipulating the handle manually, continuous operation and quick operation have been difficult. FIG. 1 shows a view of the screen device 1 viewed from the rear. FIG. 2 shows the screen device 1 in a state in which the crown device 2 is operated. FIG. 3 shows an example of a conventional handle operation type crown device 2. In the crown device shown in FIG. 3, the left and right frames 3, 4 are provided with supporting portions for the pins 5, 6 facing each other on the upper portions thereof, and the pins 5, 6 extending horizontally in the front-rear direction are provided. The base ends of screw rods 7 and 8 are rotatably connected to the pins 5 and 6, respectively, and a turnbuckle 9 is screwed to the free ends of the screw rods 7 and 8. It is worn. Here, one of the screw rods 7 and 8 is formed as a reverse screw. A handle a is fixed to the turnbuckle 9, and by operating the handle a, the distance L between the pins 5 and 6 is changed to perform a crown operation. Further, as a publicly known technique for driving a crown operation by a hydraulic motor, there are publicly disclosed Japanese Utility Model Laid-Open Nos. 4-4908 and 4-6111. In both cases, since the turnbuckle and the motor are directly connected to each other when the crown is driven, a reaction force is applied between the turnbuckle and the motor when the crown is operated. Therefore, a device for enabling the rotation is required, and the device becomes complicated.

[0004]

[Problems to be solved by the device]

 (EN) Provided is a crown device that can be greatly labor-saving driven by a hydraulic motor or the like without using human power to operate the crown device.

[0005]

[Means for Solving the Problems]

 In a crown device using a turnbuckle for expanding and contracting the left and right screen frames 3 and 4 in the upper portion of the bent portion of the screen device, the turnbuckle 9 is replaced by a hydraulic motor 16. Drive through the sprockets 21 and 10 and the chain 22, while the hydraulic motor 16 is moved along the shaft 19 provided between the left and right screen frames 3 and 4 according to the movement of the turnbuckle 9. It is attached so that it can slide freely in the left-right direction and is automatically positioned by the movement of the turnbuckle 9. Further, a disc 11 fixedly mounted on the turnbuckle 9 and a guide 23 attached to the hydraulic motor side are engaged with each other to interlock with the movement of the turnbuckle 9.

[0006]

【Example】

 4 to 8 show the crown driving device of the present invention. The crown drive device has pin supporting portions facing each other on the upper portions of the left and right frames 3 and 4, and pins 5 and 6 extending horizontally in the front-rear direction are provided. The base ends of screw rods 7 and 8 are rotatably connected to the pins 5 and 6, respectively, and a turnbuckle 9 is screwed to the free ends of the screw rods 7 and 8. . Here, one of the screw rods 7 and 8 is formed as a reverse screw.

A sprocket 10 and a disc 11 are fixed to the turnbuckle 9. Brackets 12 and 13 are fixed to the left and right frames 3 and 4 so as to face each other. Spherical bearings 14 are fitted to these brackets 12 and 13 and fixed to brackets 12 and 13 by retaining rings 15, respectively. The hydraulic motor 16 is fixed to the bracket 17. The bracket 17 is fixed to another bracket 18 (FIG. 8). A shaft 19 is fitted to the bracket 18, and is fixed to the bracket 18 by a spring pin 20. The shaft 19 is fitted in the spherical bearing 14, and the shaft 19 is slidable in the left-right direction inside the spherical bearing 14. A sprocket 21 is fitted to the output shaft of the hydraulic motor 16 at its base end. A roller chain 22 is wound around the sprockets 10 and 21. The tip of the guide 23 has a bifurcated shape, and the disc 11 is fitted therein and fixed to the bracket 18. In order to drive the turnbuckle 9, a transmission device between two shafts such as a belt and a gear may be used in addition to the drive by the chain 22.

[0008]

[Action]

 In the crown drive device of FIGS. 4 to 8, the screw rods 7 and 8 are moved in the left and right directions by the rotation of the hydraulic motor 16 and the rotation of the turnbuckle 9 through the sprockets 21 and 10 and the roller chain 22. The distance L between the pins 5 and 6 (Fig. 4) changes. In the present invention, the left and right positions of the sprockets 21 and 10 are determined by the guide 23 and the disc 11 so that the left and right positions of the sprockets 21 and 10 do not shift during operation. The sprocket 10 is supported by a bracket 18 via a hydraulic motor 16 and a bracket 17, and the bracket 18 is supported by a shaft 19. The shaft 19 is supported by the spherical bearings 14 supported by the frames 3 and 4 so as to be slidable in the left and right directions. Therefore, since the bracket 18 is separated from the movement of the frames 3 and 4, the crown operation can be performed without difficulty. When the frames 3 and 4 are opened and closed like scissors in the left and right direction (see FIGS. 1 and 2), the shaft bearing 19 in FIG. 8 uses the spherical bearing 14 so that the shaft 19 is always kept horizontal. The opening angle of the shaft center due to the opening of 4 can be absorbed.

[0009]

【effect】

 In a crown device using a turnbuckle for expanding and contracting the left and right screen frames 3 and 4 in the upper portion of the bent portion of the screen device, the turnbuckle 9 is replaced by a hydraulic motor 16. Drive through the sprockets 21 and 10 and the chain 22, while the hydraulic motor 16 is moved along the shaft 19 provided between the left and right screen frames 3 and 4 according to the movement of the turnbuckle 9. It is slidable in the left-right direction and is automatically positioned by the movement of the turnbuckle 9. Then, the disk 11 fixedly mounted on the turnbuckle 9 and the guide 23 attached to the hydraulic motor side are engaged with each other to interlock with the movement of the turnbuckle 9. In this way, since the operation of the crown device does not depend on human power, it is possible to greatly save labor. In particular, when the turnbuckle for expanding and contracting the crown device is operated, the motor is also made to respond at the same time, so that the driving chain does not move out of the way and the drive is always smooth. Is possible.

[Brief description of drawings]

FIG. 1 is a rear view of a known screen device.

FIG. 2 also shows a state in which the crown device is bent.

FIG. 3 shows a manually operated crown device, FIG. 3 (a) is a front view, FIG. 3 (b) is a plan view, and FIG. 3 (c) is a left side view of FIG. 3 (a).

FIG. 4 is a front view of the crown device of the present invention.

FIG. 5 is a plan view of the same.

6 is a right side view of FIG. 4.

FIG. 7 is a view on arrow A in FIG.

FIG. 8 is a view on arrow B of FIG.

[Explanation of symbols]

 a handle 1 screen device 2 crown device 3,4 screen frame 5,6 pin 7,8 screw rod 9 turnbuckle 10 sprocket 11 disk 12,13 bracket 14 spherical bearing 15 snap ring 16 hydraulic mode 17, 18 Bracket 19 Shaft 20 Spring pin 21 Sprocket 22 Roller chain 23 Guide

Claims (2)

[Scope of utility model registration request] 1. A turn buckle for a crown device using a turn buckle for expanding and contracting left and right screen frames (3, 4) above and below a bent portion of the screen device. (9) is driven from the hydraulic motor (16) through the sprockets (21, 10) and the chain (22), while the hydraulic motor (16) is moved according to the movement of the turnbuckle (9). Shaft (1) provided between the left and right screen frames (3, 4)
A hydraulically movable crown device for a screen device, which is slidably attached in the left-right direction along 9) and is automatically positioned by the movement of the turnbuckle (9). 2. A disc (11) fixed to a turnbuckle (9).
2. A hydraulically movable crown device for a screen device according to claim 1, wherein said guide and said guide (23) mounted on the hydraulic motor side are engaged with each other to interlock with the movement of the turnbuckle (9).