CN112743383A - Chip removal system with crushing function - Google Patents
Chip removal system with crushing function Download PDFInfo
- Publication number
- CN112743383A CN112743383A CN201911046005.7A CN201911046005A CN112743383A CN 112743383 A CN112743383 A CN 112743383A CN 201911046005 A CN201911046005 A CN 201911046005A CN 112743383 A CN112743383 A CN 112743383A
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- China
- Prior art keywords
- chip
- chip removal
- crushing
- detection switch
- driving
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
A chip removal system with a crushing function belongs to the field of chip removal of machine tools and comprises a chip removal device, wherein the chip removal device is provided with a chip receiving port and a chip removal port; the crushing device comprises a shell, a driving part, a transmission part and a crushing cutter set, wherein the top and the bottom of the shell are correspondingly provided with a chip inlet and a chip outlet; the chip inlet corresponds to the chip outlet; the chip removal device and the driving piece are electrically connected with the control assembly. The crushing device directly falls into the chip removal device to be discharged after crushing the chips, and jamming is avoided. And the crushing and conveying work can be automated through the control assembly.
Description
Technical Field
The invention is mainly used in the chip removal occasions of machine tools, mainly relates to the related field of chip removal systems, and particularly relates to a chip removal system with a crushing function.
Background
The existing chip cleaner has two problems in conveying the massive and long-strip-shaped chips. Firstly, the smear metal after the discharge generally adopts album bits car or collection bits frame to collect, and the bulk is fluffy with rectangular form comparison, and area is big, and collection bits car is filled with very easily, and the clearance number of times is frequent. Secondly, the conveying capacity of the conveyor is limited, the conveying chain is easily clamped by the bulk or strip chips in the conveying process of the chip removal system, the shell of the chip removal system is deformed, the bulk or strip chips can be reversely coiled into the conveying chain sometimes and cannot be smoothly discharged, the failure rate is high, and the service life of the device is shortened.
At present, a chip crusher is independently arranged, but the chip crusher occupies a larger space, is not suitable for most of the existing numerical control machines and increases more cost. The patent CN201610155619.9 'Metal filing treatment and recovery method' is retrieved, and the scheme is that metal filing is recovered through a metal filing recovery system, wherein the metal filing is put into a crusher, the crusher crushes materials, the crushed materials fall into a storage hopper, and then the storage hopper is input into a chip removal system. The chip removal system is used for carrying out subsequent treatment on the crushed material. Although the chip cleaner can normally convey the scrap iron in the process, the process occupies a large space and lacks an automatic detection function.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a chip removal system with a crushing function. The scrap discharge device comprises a scrap discharge device, a crushing device and a control assembly, wherein the control assembly is electrically connected with the crushing device to control the crushing device to crush large scraps and long scraps, the crushed scraps fall onto a conveying belt of the scrap discharge device, and then the control assembly controls the scrap discharge device to start to convey and discharge the scraps. The invention can not only crush and smoothly discharge large-cluster chips, but also automatically control the crushing and chip discharging work through the control assembly, thereby reducing the unnecessary operation of the machine.
The technical scheme adopted by the invention for solving the technical problems is as follows: a chip removal system with a crushing function comprises a chip removal device, a crushing device and a control assembly, wherein the chip removal device is provided with a chip receiving port and a chip removal port, and the crushing device and the control assembly are arranged above the chip receiving port; the crushing device comprises a shell, a driving part, a transmission part and a crushing cutter set, wherein the top and the bottom of the shell are correspondingly provided with a chip inlet and a chip outlet; the chip inlet corresponds to the chip outlet; the chip removal device and the driving piece are electrically connected with the control assembly.
Furthermore, the driving part comprises a variable frequency motor, the transmission part comprises a driving shaft, transmission shafts arranged at intervals, a driving gear and a driven gear, one end of the driving shaft is connected with the variable frequency motor shaft, and the other end of the driving shaft is connected with the driving gear shaft; the crushing cutter sets are respectively sleeved on the driving shaft and the transmission shaft, and the blades are matched with each other; the driven gear is installed at the position where the transmission shaft matches the driving gear and is meshed with the driving gear.
Furthermore, the control assembly comprises a first detection switch, a second detection switch, a third detection switch and a PLC (programmable logic controller), wherein the first detection switch is arranged at the position of the chip inlet and higher than the crushing cutter set and is used as a signal for starting the crushing device to work; the second detection switch is arranged in the chip removal device matched with the chip connecting opening and used as a signal for starting the chip removal device; the third detection switch is arranged at the chip inlet and higher than the first detection switch and is used as a signal for accelerating the work of the crushing device; the PLC controller is electrically connected with the first detection switch, the second detection switch and the third detection switch, and receives and processes signals and sends instructions.
Further, the first detection switch and the third detection switch are infrared sensors; the second detection switch is a gravity sensor.
Further, the transmission shaft is provided with at least 1.
Furthermore, the working surface of the crushing cutter group corresponds to the chip receiving port.
According to the technical scheme, the chip removal system with the crushing function provided by the invention has the advantages that the infrared sensor on the crushing device is used for sensing chips at an inlet, then the crushing device is started to work, the crushed chips directly fall into the chip inlet of the chip removal device, the gravity sensor is used for sensing the chips to enter the chip removal device, then a signal is sent to the control system, the control system sends an instruction for starting the chip removal device, and the chips are discharged through the conveying belt of the chip removal device. The automatic crushing and automatic chip removal of large-cluster chips are realized, the no-load operation of a chip removal system is avoided, energy is saved, consumption is reduced, intelligence is realized, and manual watching and confirming work is reduced. And the broken chips can not damage the chip removal device, which is beneficial to improving the service life of the equipment.
Drawings
Fig. 1 is a schematic overall structure diagram of a chip removal system with a crushing function according to one embodiment of the invention;
fig. 2 is a schematic cross-sectional view of a chip removal system with a breaking function according to one of the disclosed embodiments of the invention;
fig. 3 is a schematic cross-sectional view of a chip removal system breaker with breaking function according to one embodiment of the present disclosure;
fig. 4 is a partially enlarged cross-sectional schematic view of a chip removal system crushing device with a crushing function according to one embodiment of the invention;
in the drawings: 100-chip removal device, 200-crushing device, 110-main body, 120-conveying belt, 130-speed reducer, 140-chain wheel, 150-transmission shaft, 111-chip receiving port, 112-chip removing port, 210-shell, 220-variable frequency motor, 230-driving shaft, 240-transmission shaft, 250-driving gear, 260-crushing cutter group, 270-bearing, 211-chip inlet, 212-chip outlet, 310-first detection switch and 320-second detection switch; 330-third detection switch.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments. As used herein, the term "secured" may be mounted, welded, riveted, etc., and the term "connected" may be directly connected, indirectly connected, and the like for the purpose of illustrating the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, the chip removal system with the crushing function comprises a chip removal device, a crushing device and a control assembly, wherein the chip removal device is provided with a chip receiving port and a chip removal port, and the crushing device and the control assembly are arranged above the chip receiving port; the crushing device comprises a shell, a driving part, a transmission part and a crushing cutter set, wherein the top and the bottom of the shell are correspondingly provided with a chip inlet and a chip outlet; the chip inlet corresponds to the chip outlet; the chip removal device and the driving piece are electrically connected with the control assembly.
The control assembly controls the crushing device to crush the bulk cuttings firstly, and then the crushed cuttings fall into the chip removal device and are output by the chip removal device. The automatic crushing and automatic chip removal of large-cluster chips are realized preliminarily, and the occurrence of faults such as clamping stagnation and the like is avoided.
The chip removal system with a breaking function is described below with reference to specific embodiments in order to further understand the inventive concept of the chip removal system with a breaking function. It should be noted that the chip removal device in the present invention may be a belt conveyor, a chain plate chip removal machine, a scraper chip removal machine, a spiral chip removal machine, etc., as long as chip conveying and discharging can be achieved, and the specific form and structure are not particularly limited. The present embodiment will be described in detail by taking a chain plate chip removal machine as an example of a chip removal device.
Referring to fig. 1 and fig. 2, a chip removal system with a crushing function includes a chain plate chip remover 100 (a chip removal device, which is used in the following description) and a crushing device 200. The crushing device 200 is installed at one end of the chain scraper 100. Specifically, the chain plate chip removal machine mainly comprises a main body 110, a chain plate 120, a speed reducer 130, a chain wheel 140 and a transmission shaft 150. Chip receiving ports 111 are arranged at the lower parts of the two ends of the main body 110, and chip discharging ports 112 are arranged at the higher parts. The body 110 is provided with a passage therein to match the circulation of the link plate 120 therein. The speed reducer 130 is fixed on the outer side of the main body 110, the transmission shaft 150 penetrates through the main body and is connected with the speed reducer shaft, and the chain wheels 140 are respectively installed at two ends of the transmission shaft and are meshed with the chains on two sides of the chain plate in a matching manner. When the speed reducer is started, the chain plate can be driven to circularly operate in the main body, and chips are conveyed from the chip connecting port to the chip outlet. Further, the chip removal system with the crushing function further comprises a crushing device 200 and a control assembly. The breaker is installed and is received bits mouth 111 top, control assembly and breaker and link joint chip removal electromechanical connection.
Referring to fig. 3 and 4, the crushing device 200 includes a housing 210, a driving member, a transmission member, and a crushing blade set 260. In one embodiment, the drive includes a variable frequency motor 220; the transmission member includes a driving shaft 230, a transmission shaft 240 spaced apart from the driving shaft, a driving gear 250, and a driven gear (not shown). The crushing cutter set 260 is sleeved on the driving shaft 230 and the transmission shaft 240 from one end respectively, and the blades are matched with each other; then the bearings 270 are respectively sleeved from the two ends of the driving shaft and the transmission shaft and slide relatively for a certain distance to be matched with the crushing cutter set; then the driving gear 250 is connected with one end shaft of the driving shaft through the matching of keys and key slots, and the driven gear is connected with one end shaft of the transmission shaft through the matching of keys and key slots on one side of the driving gear 250. The two parts of the driving knife tackle and the driven knife tackle are formed, and then one end of the driving shaft 230 in the driving knife tackle, which is far away from the driving gear, is embedded into the variable frequency motor 220 installed on the shell 210 and is connected with the key groove in a matching way through a key. After the driving gear is meshed with the driven gear in size, bearings in the driving cutter set and the driven cutter set are fixedly connected with the shell respectively. When the variable frequency motor 220 is started, the driving shaft 230 is driven to rotate, the driving sprocket 250 mounted on the driving shaft drives the driven sprocket mounted on the driven shaft 240 engaged therewith to rotate relatively, and the crushing cutter sets 260 mounted on the driving shaft and the driven shaft respectively are driven to rotate relatively, so as to crush chips. It should be noted that, according to the amount of the broken cuttings, the transmission shaft can be provided with a plurality of transmission shafts, so that the broken working surface is increased, and a group of breaking cutter sets can be installed without following the transmission shaft. The connection with the driving shaft can also be driven by the meshing of gears.
The top and the bottom of the housing 210 are correspondingly provided with a chip inlet 211 and a chip outlet 212, the crushing cutter group is located between the chip inlet and the chip outlet, and the chip inlet 111 corresponds to the chip outlet 212.
Furthermore, the control assembly is electrically connected with the speed reducer and the variable frequency motor. The device comprises a first detection switch 310, a second detection switch 320, a third detection switch 330 and a PLC controller. The first detection switch is arranged on the chip inlet 211 and is higher than the shell of the crushing cutter set 260, and is used as a signal for starting the crushing cutter set; the second detection switch 320 is arranged between two layers of chain plates below the chip receiving port 111 and is used as a signal for starting the chip removal device; the third detecting switch 330 is installed on the housing of the chip inlet 211 higher than the first detecting switch 310, and is used as a signal for accelerating the operation of the crushing device. The PLC is electrically connected with the first detection switch and the second detection switch, and receives and processes signals and sends instructions.
In one embodiment, the first detection switch and the third detection switch may adopt infrared sensors; the second detection switch adopts a gravity sensor. The infrared sensor controls the crushing device to work by sensing the height of the chips falling into the crushing cutter set. The gravity sensor transmits signals by sensing cutting chips falling from the chip receiving port on the chain plate and controls the chip removal device to work by the PLC controller. It should be noted that the working surface of the crushing cutter group is correspondingly matched with the chip receiving port, so that the accuracy of the detection value of the gravity sensor is facilitated, and misoperation is avoided.
Specifically, in one embodiment, the first detection switch 310 is disposed 10 cm above the crushing blade set 260, the third detection switch 330 is disposed 10 cm above the first detection switch, when the chips fall from the chip inlet 211 onto the crushing blade set 260 by a certain amount, the first detection switch detects a signal and transmits the signal to the PLC controller, the PLC controller contacts the signal and converts the signal, and then sends a start command to the inverter motor 220, and the crushing device 200 starts the crushing operation. When the third detection switch 330 detects and transmits a signal, the quantity of chips to be crushed is large, and the PLC sends an acceleration instruction to accelerate the frequency of the variable frequency motor, so that the crushing efficiency is improved, and the chips are prevented from being stuck in the crushing device. The chips crushed by the crushing device fall onto the chain plate 120 from the chip outlet 212 through the chip receiving port 111 of the chip discharging device 100, when the amount of the chips reaches a certain degree, the gravity of the chips forces the chain plate to deform or sink in the direction of gravity, the second detection switch 320 installed below the chain plate detects a signal at the moment and transmits the signal to the PLC controller, the PLC receives the signal and then sends an instruction to the motor 130, and the motor is started to drive the chain plate to move towards the chip discharging port 112 so as to discharge the chips. When the PLC controller can not receive the signal sent by the detection switch, the motor stop rotating command can be sent down, so that the functions of automatic control and energy saving are realized.
It should be noted that, in order to ensure that the gravity sensor accurately detects a signal, a plurality of chain plate components of the gravity sensor, which are matched with the lower part of the chip receiving opening, can be arranged along the running direction of the chain plate.
According to the technical scheme, the chip removal system with the crushing function provided by the invention has the advantages that the infrared sensor on the crushing device is used for sensing chips at an inlet, then the crushing device is started to work, the crushed chips directly fall into the chip inlet of the chip removal device, the gravity sensor is used for sensing the chips to enter the chip removal device, then a signal is sent to the control system, the control system sends an instruction for starting the chip removal device, and the chips are discharged through the conveying belt of the chip removal device. The automatic crushing and automatic chip removal of large-cluster chips are realized, the no-load operation of a chip removal system is avoided, energy is saved, consumption is reduced, intelligence is realized, and manual watching and confirming work is reduced. And the broken chips can not damage the chip removal device, which is beneficial to improving the service life of the equipment. Because the crushing device is provided with the two sensors, the frequency of the motor can be changed according to the crushing amount, the energy is saved, the crushing efficiency is improved, and the phenomenon that the crushing device is blocked when the crushed chip amount is large can be avoided.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A chip removal system with a crushing function comprises a chip removal device, wherein the chip removal device is provided with a chip receiving port and a chip removal port, and is characterized by further comprising a crushing device and a control assembly, wherein the crushing device and the control assembly are installed above the chip receiving port; the crushing device comprises a shell, a driving part, a transmission part and a crushing cutter set, wherein the top and the bottom of the shell are correspondingly provided with a chip inlet and a chip outlet; the chip inlet corresponds to the chip outlet; the chip removal device and the driving piece are electrically connected with the control assembly.
2. The chip removal system with the crushing function according to claim 1, wherein the driving part comprises a variable frequency motor, the driving part comprises a driving shaft, a transmission shaft, a driving gear and a driven gear which are arranged at intervals, one end of the driving shaft is connected with the variable frequency motor shaft, and the other end of the driving shaft is connected with the driving gear shaft; the crushing cutter sets are respectively sleeved on the driving shaft and the transmission shaft, and the blades are matched with each other; the driven gear is installed at the position where the transmission shaft matches the driving gear and is meshed with the driving gear.
3. The chip removal system with the crushing function according to claim 1, wherein the control assembly comprises a first detection switch, a second detection switch, a third detection switch and a PLC (programmable logic controller), and the first detection switch is arranged at the chip inlet and higher than the crushing cutter set and is used as a signal for starting the crushing device; the second detection switch is arranged in the chip removal device matched with the chip connecting opening and used as a signal for starting the chip removal device; the third detection switch is arranged at the chip inlet and higher than the first detection switch and is used as a signal for accelerating the work of the crushing device; the PLC controller is electrically connected with the first detection switch, the second detection switch and the third detection switch, and receives and processes signals and sends instructions.
4. The chip removal system with a chip breaking function according to claim 3, wherein said first detection switch and said third detection switch are infrared sensors; the second detection switch is a gravity sensor.
5. The chip removal system with a crushing function according to claim 1, wherein at least 1 transmission shaft is provided.
6. A chip removal system with chip breaking function according to any one of claims 1 to 3, characterized in that the working surface of the breaking blade group corresponds to the chip receiving port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911046005.7A CN112743383A (en) | 2019-10-31 | 2019-10-31 | Chip removal system with crushing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911046005.7A CN112743383A (en) | 2019-10-31 | 2019-10-31 | Chip removal system with crushing function |
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| CN112743383A true CN112743383A (en) | 2021-05-04 |
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| CN201911046005.7A Pending CN112743383A (en) | 2019-10-31 | 2019-10-31 | Chip removal system with crushing function |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069686A (en) * | 1991-08-22 | 1993-03-10 | 塞拉机械股份有限公司 | Chip crusher |
| KR20010091571A (en) * | 2000-03-16 | 2001-10-23 | 권 영 두 | The chip cutting device of a machine tool |
| DE10209914A1 (en) * | 2002-03-07 | 2003-09-25 | Buerener Maschf Gmbh | Machining chip removal and breakage system comprises cooling lubricant flow device flushing chip through crusher to outlet at steady rate. |
| CN104999333A (en) * | 2015-07-29 | 2015-10-28 | 上海青川机械配件有限公司 | Shear type chip smashing machine |
| CN105127830A (en) * | 2015-09-08 | 2015-12-09 | 宁夏共享机床辅机有限公司 | Shear type metal chip crushing machine |
| CN204976173U (en) * | 2015-07-30 | 2016-01-20 | 南通科技投资集团股份有限公司 | Chip removing machine |
| CN105728128A (en) * | 2015-12-31 | 2016-07-06 | 宁夏共享机床辅机有限公司 | Metal cutting and crushing device |
| CN207127600U (en) * | 2017-05-03 | 2018-03-23 | 福建阳昌纺织科技有限公司 | A kind of safe chip removal device of numerical control device |
| CN108579903A (en) * | 2018-04-10 | 2018-09-28 | 洛阳智昊工程科技有限公司 | A kind of rubble production line operating mode real-time management system and management method based on Internet of Things |
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2019
- 2019-10-31 CN CN201911046005.7A patent/CN112743383A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069686A (en) * | 1991-08-22 | 1993-03-10 | 塞拉机械股份有限公司 | Chip crusher |
| KR20010091571A (en) * | 2000-03-16 | 2001-10-23 | 권 영 두 | The chip cutting device of a machine tool |
| DE10209914A1 (en) * | 2002-03-07 | 2003-09-25 | Buerener Maschf Gmbh | Machining chip removal and breakage system comprises cooling lubricant flow device flushing chip through crusher to outlet at steady rate. |
| CN104999333A (en) * | 2015-07-29 | 2015-10-28 | 上海青川机械配件有限公司 | Shear type chip smashing machine |
| CN204976173U (en) * | 2015-07-30 | 2016-01-20 | 南通科技投资集团股份有限公司 | Chip removing machine |
| CN105127830A (en) * | 2015-09-08 | 2015-12-09 | 宁夏共享机床辅机有限公司 | Shear type metal chip crushing machine |
| CN105728128A (en) * | 2015-12-31 | 2016-07-06 | 宁夏共享机床辅机有限公司 | Metal cutting and crushing device |
| CN207127600U (en) * | 2017-05-03 | 2018-03-23 | 福建阳昌纺织科技有限公司 | A kind of safe chip removal device of numerical control device |
| CN108579903A (en) * | 2018-04-10 | 2018-09-28 | 洛阳智昊工程科技有限公司 | A kind of rubble production line operating mode real-time management system and management method based on Internet of Things |
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