JP3039213U - Beam conveyor - Google Patents

Abstract

(57) [Summary] (Correction) [Problem] To realize a beam conveyor that has a large load capacity, is capable of high-speed conveyance, and can convey a variety of articles. SOLUTION: The mechanism is simplified by reciprocating a lift mechanism and performing a lift operation with a lift operation cam curve that is relative to the reciprocating motion. Since the support roller 13 is arranged immediately below the lift 10 and the load is supported by the housing 18, the load resistance is high. The transport beam rows 1 and 2 are configured with a small gap in the shape of a saw and can transport various articles.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a beam conveyor that conveys a conveyed product in a straight line on the same plane, and more particularly, to a beam conveyor that increases a load capacity and enables high-speed conveyance.

[0002]

[Prior art]

 Conventionally, there is Japanese Patent Application No. 6-970 by the present applicant as a beam conveyor using two sets of walking beam type transfer devices. As shown in FIG. 3A, a reciprocating cylinder cam 52 and a lift groove cam 53 are provided on the drive shaft 51, and the reciprocating motion is operated by the cylindrical cam and the lift motion is operated by the groove cam. As shown in Fig. 3 (b), two cam followers 53a, 53b are attached to the reciprocating cylindrical cam 52 with a 180-degree phase shift, and a constant speed feed and a fast return are stroke-connected. The beam 55 is transmitted to the carrier beams 56a, 56b, 57a, 57b. As shown in FIG. 3C, a lift operation cam follower 58 engages with the lift groove cam 53 to move the slide rail 59 up and down. The other slide rail is moved up and down by a groove cam that is 180 degrees out of phase with the illustrated groove cam.

[0003]

[Problems to be solved by the device]

 However, the conventional beam conveyor has the following drawbacks.

Since the total weight of the slide rail, the carrier beam, and the transported object is applied to the lift operation cam follower, the lift groove cam and the drive shaft must be designed to withstand the gravitational force of the lift groove cam and the device. Upsizing.

Since the long slide rail moves up and down, the inertial load is large and parasitic vibration due to the natural frequency is generated. In addition, long drive shafts have a critical speed in the speed range and resonate near a certain speed. Since it is necessary to take measures to prevent vibration, it is difficult to increase the speed.

In order to solve these problems, the present invention has an object to realize a beam conveyor having a large load resistance and capable of high speed.

[0007]

[Means for Solving the Problems]

 First, we adopted a method of eliminating the vertical movement of the slide rail, incorporating a lift mechanism in the stroke slide, and moving the plate cam according to the relative lift curve to obtain the lift operation. Next, in order to increase load bearing capacity, a roller that rolls on the bottom surface of the housing is installed at the lower end of the lift mechanism to support the weight of the transported object and beam from the installation surface. In addition, the gap between the alternating beams of a large number of beams was set small.

[0008]

[Action]

 In the present invention, since the vertical component of the weight of the transported object is supported and moved by the transportation rollers, the load on the driving force is reduced, and the heavy load can be transported by the motor having a relatively small output. Since the mechanism to obtain the vertical movement by the plate cam using the relativizing cam curve, the slide rail is not required, and the resonance due to the natural frequency of the slide rail can be prevented. The drive mechanism has become simpler than the conventional example in which the drive shaft directly supports the load. As a result of shortening the drive shaft, it is possible to reduce the occurrence of critical speed and increase the speed.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1A is a side view of an embodiment of the present invention, and FIG. 1B is a sectional view. The present invention is composed of two sets of walking beam mechanisms, but for simplicity, one set will be described first.

In FIG. 1A, 21 is a motor, 20 is a coupling, 19 is a drive shaft, and 14 is a cylindrical cam. When the motor 21 rotates, the reciprocating motion groove cam 16 formed in the cylindrical cam 14 moves the reciprocating slider 4, and the relativizing lift groove cam 17 moves the lift slider 3. The reciprocating groove cam 16 is machined with a cam curve F1 shown in FIG. 2, and gives the lift guide 9 and the lift 10 a reciprocating motion consisting of a constant velocity motion and a quick return motion by the reciprocating motion rod A7. The relativizing lift groove cam 17 is processed by a cam curve F3 obtained by adding a reciprocating cam curve to the lift cam curve shown in FIG. 2, and moves the lift operation round bar A8 and the plate cam 11 in the horizontal direction. By the action of the plate cam 11, the movement direction is converted to the vertical direction via the lift operation cam follower 11 attached to the lift 10, so that the lift 10 obtains the vertical movement, but the lift 10 has already moved to the reciprocating groove. The reciprocating motion according to the reciprocating cam curve is given by the cam 16, and only the motion according to the lift cam curve F2 is taken out by the relative motion. As a result, when the motor 21 rotates, the carrier beam array A2 moves at a constant speed at the height of the carrying surface, descends at the end of the carrier beam row, performs quick return motion at the lowered position, and further rises and returns to the carrier surface. The transport operation of is repeated. The constant velocity section of the reciprocating cam curve is assigned to 180 degrees or more.

In FIG. 1B, 22 is a reciprocating motion round bar B, and 23 is a lifting motion round bar B. The same pair as the walking beam mechanism shown in FIG. 1 (a) is installed to face each other, and the engagement positions of the cam followers to the reciprocating motion groove cam 16 and the relative lift motion groove cam 17 are shown in FIG. Thus, the phase is shifted by 180 degrees. With this configuration, the transport beam train A (2) and the transport beam train B (1) alternately repeat constant velocity motion while overlapping on the transport surface, so that the transported object is transported at a constant velocity without moving up and down. .

FIG. 2 is an explanatory diagram of the relative lift operation cam curve. The reciprocal lift operation cam curve is obtained by adding the forward operation cam curve, which is a combination of the constant speed operation curve and the fast return operation curve, and the lift operation cam curve that determines the timing of the vertical movement of the carrier beam train. In the figure, F1 is a reciprocating motion cam curve, F2 is a lift motion cam curve, and F3 is a relative lift motion cam curve. The lift mechanism reciprocates, and the lift operation is performed by the lift operation cam curve that is made relative to the reciprocation. As a result, the slide rail becomes unnecessary. Since the weight of the conveyed object is supported by the housing (18) by the supporting roller (13) and does not act as a load on the drive shaft (19), the load resistance is improved. Since the slide rail has been eliminated and the drive shaft has been shortened, high-speed transfer is possible.

[0014]

[Effect of the invention]

 According to the beam conveyor of the present invention described above, vibration due to natural frequency and critical speed is reduced, and high-speed transportation can be performed quietly and smoothly. Also, by installing a large number of beams with a slight gap and forming a table-shaped carrier beam, cans, bottles, containers, etc. can be carried, making it possible to apply to various industrial fields.

[Brief description of the drawings]

FIG. 1A is a side view of a mechanism of an embodiment of the present invention,
(B) is sectional drawing in the arrow P.

FIG. 2 is an explanatory view showing a cam curve of an embodiment according to the present invention.

FIG. 3A is a side view showing a conventional example, and FIG. 3B is an arrow Q.
2 is a sectional view taken along line (c), and FIG.

[Explanation of symbols]

 1 ... Carrier beam row B 2 ... Carrier beam row A 3 ... Lifting slider 4 ... Reciprocating slider 5 ... Fixing screw 6 ... Linear bearing 7 ... Reciprocating round Bar A 8 ... Lifting operation Round bar A 9 ... Lifting guide 10 ... Lifting 11 ... Plate cam 12 ... Lifting operation cam follower 13 ... Support roller 14 ... Cylindrical cam 15 ... Reciprocating cam follower 16 ... Reciprocating groove cam (F1) 17 ... Relative lift groove cam (F3) 18 ... Housing 19 ... Drive shaft 20 ... Coupling 21 ... Motor 22・ ・ ・ Reciprocating motion round bar B 23 ・ ・ ・ Lifting motion round bar B 51 ・ ・ ・ Drive shaft 52 ・ ・ ・ Reciprocating motion cylindrical cam 53 ・ ・ ・ Lift groove cam 54 ・ ・ ・ Cam follower 55 ・ ・ ・ Stroke connecting beam 56a 56b ... carrying beam A 57a, 57 b ... carrying beam B 58 ... lift operation cam follower 59 ... slide rail

Claims (3)

[Utility model registration claims] 1. The present invention comprises two sets of carrier beam rows (1,
In a beam conveyor that conveys a conveyed object horizontally by alternately acting 2), a reciprocating cam curve and a lifting cam curve are formed by a lift (10) performing a lift operation, a lift guide (9), and a plate cam (11). A beam conveyor characterized in that a lift operation is obtained by operating a relativistic lift cam curve obtained by adding. 2. The lift guide (9) according to claim 1.
A beam conveyor characterized in that a supporting roller (13) which moves in contact with a housing (18) is provided at the lower end of the supporting roller (13) to support and convey the vertical component force of the gravity of the conveyed object by rolling. 3. A beam conveyor according to claim 1, wherein a plurality of carrier beam rows (1, 2) arranged in a saw-like shape are combined to reduce the gap between the alternately arranged beams.